Apr 13

Reading notes from RabbitMQ in Action


  1. Getting RabbitMQ
  1. sudo apt-get install rabbitmq-server
  2. /usr/sbin/rabbitmqctl status
  3. sudo pip install pika

RabbitMQ in Action

  1. RabbitMQ terminology
  1. producer – publishes the message to an exchange
  2. channel – sub-socket inside open TCP socket to RabbitMQ (TCP sockets are re-used to avoid overhead connection costs)
  3. consumers – consume the message from the queue
  1. basic.consume – passively receive messages from the queue (push mechanism)
  2. basic.get – poll-based requests, essentially subscribe, basic.consume of 1, unsubscribe
  3. auto_ack is set true, fires off after receiving, or use basic.ack if auto_ack is false
  4. basic.reject rejects the message, requeue=true puts it back on the queue, use requeue=false for malformatted messages
  1. queue properties
  1. exclusive – can only be subscribed by 1 consumer, useful for testing
  2. auto-delete – delete as soon as last consumer unsubscribes
  3. durable – should be re-created after re-starting?
  1. exchanges – publishers send messages to exchanges, who then route them to one or more queues
  1. direct – routing key must match with the name of the queue
  1. $channel->basic_publish($message, $exchange=’’, $routing=’test-queue’)
  1. fanout – broadcast the message to every queue that’s bound to a particular exchange
  2. topic exchange – can use a wildcard key, * if you have more characters, # for everything
  1. Vhosts
  1. each vhost has its own exchanges, bindings and queues
  2. permissions are per vhost
  3. default: username=guest, password=guest
  4. rabbitmqctl list_vhosts
  5. rabbitmqctl add_vhost
  6. rabbitmqctl delete_vhost
  1. Persistence
  1. set exchange durable=true, survives the restart
  2. set queue durable=true, survives the restart
  3. set message persistent=true (delivery mode = 2)
  4. persistent message is flagged in persistence log after being delivered and ACKed
  1. if the server crashes before the garbage collector has run, it will be re-delivered
  1. persistence can cause 10x decrease, but SSD helps
  2. structure clusters into critical (persistent, SSD) and fast (no persistence)
  1. Queue management
  1. rabbitmqctl list_queues
  2. rabbitmqctl list_queues -p specific.vhost
  3. rabbitmqctl rotate_logs suffix_to_appent.to_old_logs
  1. For messages requiring confirmation, the publisher can set reply-to header of the AMPQ message, and then listen for a confirmation to arrive on a separate queue
  2. Inside a cluster, RabbitMQ does not automatically replicate the queues – for persistent queues this would imply being copied over the network, and being copied to disk, which could pose significant performance issues
  1. As a follow-up, if the queue was marked durable, and the node crashed, the node would have to be resurrected for that queue’s messages to be retrieved from persistent storage
  1. Exchanges in RabbitMQ are lightweight – they’re essentially routing tables storing the routing keys and queue names. Therefore replicating (and scaling out) exchanges is pretty easy
  2. What happens when you publish the message into the exchange, and the exchange node fails? You lose the message
  1. If you employ AMPQ transaction, it will block until you get a confirmation
  2. You could also be listening for publisher confirms and have some logic in publisher to deal with messages that were lost by the exchange
  1. Storing metadata on disk allows for easier restart, storing metadata in RAM allows for easier declaration of new exchanges, queues or bindings, as that operation will block until all of the nodes in the cluster have propagated it
  1. But what if you’re doing RPC with separate anonymous queues for ACKs? Super-noisy.
  2. RabbitMQ requires one node stores metadata on disk, everybody else can store metadata in RAM
  1. Declaring a mirrored queue requires hard-coding the specific node name into your application
  1. Cannot mirror on all nodes, since potentially that would degrade performance
  2. A newly declared mirror queue will copy the contents of the queue from the point of declaration – it doesn’t fully mirror the queue
  1. Mirrored queue is really another queue with a fanout exchange
  1. Using publisher confirms on mirrored queue will cause ACKs to be delivered only when ALL slaves received the message
  2. You can have a weird situation when the master host fails and ACK never arrives
  1. When the master fails, all consumers need to re-attach to the new master, the failover is not automatic
  1. This means the app has to understand and process consumer cancellation notices
  1. Shovel is RabbitMQ’s cross-data-center replication plugin, effectively subscribes to the master queue, and re-publishes the data to remote server


Jul 12

Reading notes from The Wall Street Journal Complete Real-Estate Investing Guidebook

  1. Four basic rules for success with real estate investments:
    1. Buy a property for less than you can sell it.
    2. Use other people’s money as much as possible.
    3. Make sure the property pays for itself.
    4. Take maximum advantage of the tax laws.
  2. When looking at appreciation rates, homeowners rarely consider total cost of ownership – replacing roof, furnaces, appliances.
  3. When you consider the total interest payments and home improvement costs, very few homeowners with a 30-year mortgage actually come out ahead.
  4. Who loans the money:
    1. Banks
    2. Partners
    3. Family and friends
    4. Hard money lenders
    5. Sellers
  5. A real-estate license won’t hurt – one needs a network of contacts to acquire properties before they hit the Web listings or newspapers.
  6. Three questions to ask about each property:
    1. Is buying this property the best use of the money?
    2. Will it pay for itself?
    3. Can you add value to the property?
  7. Two ways to raise profits for the property – increase the rent or decrease expenses.
  8. Buy locally – you’re unlikely to be able to add value to the property being on the other side of the country or world, partnerships with remote partners tend not to be hands-on.
  9. By having several properties nearby, you save on your time, and contractor’s or handyman’s time when you plan a major repair job.
  10. Cap rates are lower in desirable neighborhoods and higher in high-risk neighborhoods.
  11. Gross Rent Multiplier – ballpark figure, total price divided by annual gross income produced by the property.
  12. Debt-service ratio – used by lenders, net operating income divided by annual debt payment, should be in the range of 1-1.5.
  13. Return on investment – cap rate inclusive of loan payments.
  14. Before striking a deal, write a note to the tenants introducing yourself, and ask for what could be improved. You can get a good overview of current problems.
  15. The biggest reason people invest in real estate is to use depreciation – fantom losses on the properties count against one’s income. Government has a way, however, to recapture that at the time of sale, when it turns out the property has not depreciated as much as expected.
  16. You have to materially participate in the investment to get the investment income treatment – that means maintenance and being involved with tenants.
  17. 1031 exchange allows an investor to sell an existing property and buy a more expensive property without paying taxes on the sale.
  18. If you bought a house (for yourself) at the peak of the market and are in the hole now, rent it out for a couple of years before selling, and then capture the losses as investment losses.
  19. Each property should be a separate entity, easier to operate and sell.
  20. Home office deduction raises a flag with IRS, usually it’s hardly ever worth bothering.
  21. Types of starter investment properties:
    1. In-law units
    2. Vacation homes
    3. Single family homes
    4. Duplexes and multi-family homes
  22. With in-law units, it’s hard to qualify for material participation rule, therefore the hope is to have the expenses and depreciation be deductible and as a result have the rental income arrive to you tax-free.
  23. Vacation homes are tougher to qualify as investment properties, as you cannot use them for longer than 10% of their total rental availability. However, two weeks of rental income on such properties is tax-free.
  24. Once you pass 4-family units, residential loans no longer apply, for commercial loans it’s typically expected that you cover at least 25% of down payment.

Nov 09

Predictably Irrational

Predictably Irrational by Dan Ariely is an exploration of human behavior which diverts from the logic. Consistently. For example, imagine yourself shopping for a brand new suit and, for whatever reason, a new pen, maybe to accompany your suit. You see the $15 pen, but then remember that you saw the same pen in a different store for $7. The store is not that far (15 minute drive) and you decide that it’s totally worth it to postpone the purchase of the pen and drive by another store to save $8. Then you take a look at the suit. It’s $1,000, but then somehow you recall that a similar one. Same story – the store is 15 minutes away, and it’s $992 there, $8 cheaper.

Most people when faced with these two options will definitely purchase the pen at another store, but will forego a 15-minute drive to purchase the $992 suit. Relatively the savings are different: it’s more than a 50% on the pen, and a tiny sub-percentage point discount on the suit. Nevertheless, in a nutshell in both cases you stand to save $8 by driving 15 minutes. As a rational human, once you decide that a 15-minute drive is worth $8 in savings, you should accept that as an absolute rule. Nevertheless humans behave consistently irrational when faced with such choice in psychological studies conducted by Dan Arieli.

So what are other examples of inconsistent behavior from Predictably Irrational?

  1. When faced with the following choices for magazine subscription: $59 for digital edition, $125 for print edition, and $125 for digital+print edition, 84% opted in for the third option. Well, why not, you get digital+print for the same price as print, practically a steal. However, when the middle option is removed, people overwhelmingly (68%) chose the digital subscription. Comparing a $59 digital subscription with $125 print+digital made people wonder whether they reallyneed print subscription at all. Just having a middle option that will never be selected for obvious reasons boosted magazine’s top-of-the-line product. The magazine in question is Economist.
    • Relativity also leads to unexpected results. SEC told public companies that by 1993 they were obliged to disclose the top executives’ pay. Ideally, this would make companies more responsible to shareholders and even out the outrageous executive paychecks. In 1976 a CEO was paid 36 times the average worker pay. Net result? By 1993 the CEO pay was at 131 times average worker pay. Exposing the fat cats did not cause expected shareholder outrage, it encouraged other CEOs to demand higher pay, since now they had hard data telling them they were underpaid.
  2. Having two somewhat similar options together with dissimilar one will make people choose a better deal among similar options. Assuming that you’ve never been to Africa and have no emotional attachment to geographical locations there (choose something neutral to you if you do), what would you rather choose if I gave you a choice of (a) a free trip to Zanzibar that includes a free breakfast, (b) free trip to Zimbabwe without a free breakfast, (c) free trip to Zimbabwe with free breakfast. Most people in psychological studies consistently chose option C. Our brain is wired to compare equals, and comparing A and C without specific knowledge of locations seems like a lost cause. Comparing B and C, however, is a no-brainer – you get a free breakfast or you don’t. C is such an obvious choice, the brain shortcuts, and before long option A is out of the picture.
    • Marketing technique that utilizes this knowledge is called a decoy. Williams-Sonoma accidentally discovered it by adding another, more expensive, product to its breadmaker line. Prior to this breadmakers did not sell very well, being completely new product. When a more expensive machine was added, the original version seemed like a bargain, and also customers felt that since this was a line, not a one-off product, it must be something worth researching. Sales of the original breadmaker nearly doubled.
  3. In one study participants were asked to write down the last 2 digits of their social security number, and then write an estimated price they would pay for a bunch of unrelated items. Box of Belgian chocolates, bottle of wine, a wireless keyboard – the items were intentionally random so that most people would have a vague idea of what they cost in real world. By asking participants to write down their social security digits, researchers were hoping to prime the mind. The technique worked – people whose social security #s ended with 00-20 overall bid significantly less for the items than those with 80-99 as the first number on the list. The point is not that people with high social security numbers pay more, but the fact that making a person think about the number impacts the decision-making process, if this process involves choosing random numbers.
  4. Offering the item for free has a huge impact, even when the alternative is not that expensive. Arieli set up a stand offering two kinds of treats – Lindt truffles for 15c and Hershey kisses for 1c. The price difference was huge, but most people nevertheless seemed to appreciate Swiss chocolates over Pennsylvanian sugar-and-cocoa-butter concoction – 73% chose Lindt truffles. So another test the book author ran was selling Lindt truffles for 14c and giving Hershey’s kisses away at 0c. The relative difference was still 14c, but this time 69% of the customers chose the kiss. It’s not that 1c previously broke their budget, and all of a sudden a 0c kiss offered huge savings to hungry students. Faced with two paid choices, participants were forced to make a judgement, and in this case went for a more expensive, but higher-quality item. Faced with FREE, participants forgot all about the relative taste differences between Lindt and Hershey product, and overwhelmingly acted on instinct.
    • When Amazon was testing free shipping promotion in different countries, Amazon France did not expect any real change. After all, the French site has been charging customers 1 franc if their shopping cart when over a certain amount. It’s a modern-day equivalent of 20c, what difference could it make, if your shopping cart had to be over $25, where Amazon currently allows you to ship for free? However, going from 1 franc to 0 francs was dramatic.
  5. Setting deadlines works, and having external deadlines seems to work better. The author experimented with 3 of the classes he taught. Class A had specific deadlines on when the papers should be submitted – week 4, week 8 and week 12. Class B was free to choose its own deadlines, but it had to be done in writing – each student was asked to commit to submitting a paper by a certain week, even if the commitment involved writing ‘week 12’ for each one of the three papers. The third class had no deadlines at all, except for the fact that by the end of the course the instructor wanted to have a set of all 12 papers. Which of the classes got better final grades? It was just in the order they were listed – A did best on the exam, followed by B, followed by C.
  6. Accessories matter. The researcher has set up a coffee tasting station by giving away free coffee, which could be complemented with a variety of condiments – sugar, cream, nutmeg, cinnamon, etc. The additives were placed in Styrofoam cups with hand-written notes indicating what they were. The students were then asked the rate the quality of the coffee, supposedly for a new coffee shop that was planning to open its doors to MIT students. Second test involved brewing precisely the same coffee, except this time the condiments were placed in glass-and-steel containers on a nice looking tray with pre-printed labels. Students consistently gave the second coffee much better rating, even though the contents of the pot or the variety of condiments did not change.
  7. People have different expectations for products with various prices. Researchers conducted the experiments where a group of participants was exposed to a new pharmaceutical in a very professional environment – lab coats, brochures, and all. The experimental drug, they were told, was a pain reliever, so to conduct practical tests, they would produce an electrical shock of increasing voltage until the participant pressed the button indicating they’ve reached their maximum pain tolerance level. Price for the new drug? $2.50 a pop. To test the efficiency, the researchers first asked the participants to experience pain with no drug intake, and then undergo the same test. 100% of respondents claimed the pain was relieved and hence medication worked. The same drug was then tested on a different group of people, who accidentally (via a brochure on the table) found out the drug was 10c a pop. In this test, only half of those people claimed the pain reliever worked. The drug? In both cases Vitamin C.
  8. People order differently in public and in private. When groups of people were offered a list of beers to choose from, there was inevitably more variety in the orders than when everybody was handed a menu to write on. Hearing choices of others makes people want to express their individuality, and sometimes they tend to order their 2nd or 3rd choices after hearing what people before them have ordered. Whenever asked in private, the individuals were lacking the information on others’ choices and always went for their first choice.

Believe it or not, Predictably Irrational is available at Amazon.

May 09

How human brain judges popularity

Wall Street Journal today describes the work of Matthew Salganik and Duncan J. Watts (published in Social Psychology Quarterly in December 2008) on researching herd mentality with popularity rankings. 12,000 volunteers were given 48 random fairly obscure songs, and asked to rate them. To help things out, popularity rankings were provided. Except that a certain group saw the popularity ranking in exactly reverse order – least popular songs appearing on top. You’d think that good songs would still win based on their merit, right?

The prior No. 1 began making a comeback on the new top dog, but the former No. 47 maintained its comfortable lead on the old No. 2, buoyed by its apparent popularity. Overall, the study showed that popularity is both unstable and malleable.

Look for page 338 of that PDF document if you want to read the details of the experiment.

Another research Carl Bialik points to is Observational Learning: Evidence from a Randomized Natural Field Experiment by Hongbin Cai, Yuyu Chen, and Hanming Fang out of Duke that gave customers of Chinese restaurants a “most popular items” list when they were ordering off the menu:

We find that, depending on the specifications, the demand for the top 5 dishes is increased by an average of about 13 to 20 percent when the top 5 popularity rankings are revealed to the customers; in contrast, being merely mentioned as some sample dishes does not significantly boost their demand. Moreover, we find some modest evidence that the observational learning effect is stronger among infrequent customers, and that customers’ subjective dining experiences are improved when presented with the information about the top choices by other consumers, but not when presented with the names of some sample dishes.

May 09

Yes! 50 Scientifically Proven Ways to Be Persuasive

Noah Goldstein’s, Steve Martin’s (no, not that Steve Martin‘s) and Robert Cialdini’s Yes! 50 Scientifically Proven Ways to Be Persuasive is a pop psych book, where a bunch of research in psychology is distilled into one readable volume.

50 scientifically proven ways constitute 50 chapters of the book, longest of which take 7 pages. The authors take the position that persuasion is a science, not art, hence with the right approach anybody can become the master in the skill of persuasion. So, what are the 50 ways?

  1. Inconvenience the audience by creating an impression of product scarcity. It’s the famous change from “Call now, the operators are standing by” to “If the line is busy, call again”, that greatly improved the call volume by creating the impression that everybody else is trying to buy the same product.
  2. Introduce herd effect in highly personalized form. The hotel sign in the bathroom informed the guests that many prior guests chose to be environmentally friendly by recycling their towels. However, when the message mentioned that majority of the guests who stayed in this specific room chose to be more environmentally conscious and reused their towels, towel recycling jumped 33%, even though the message was largely the same.
  3. Ads quoting negative behavior en masse reinforces negative behavior. Petrified Forest National Park A/B tested two versions of a sign imploring people not to steal pieces of petrified forest from the park. One mentioned large amounts of petrified forest taken away on an annual basis, the other one simply asked the visitors not to remove petrified wood. The first one actually tripled the theft ratio as it showed stealing petrified wood as something commonplace. Same effect was observed after airing an ad that implored women to vote, but mentioned that 22 million single women did not vote last year. That kind of information actually portrays not voting as more socially acceptable.
  4. Avoiding magnetic middle. A California survey measured energy usage of a neighborhood on a week-by-week basis. When the average electricity consumption for the neighborhood was calculated, researchers sent thank-you cards to those using the energy conservatively, and a nice reminder to perhaps conserve to those who used electricity liberally. Net effect? While the liberals tried to cut down on unnecessary energy usage, the conservatives, finding out they’re way below average, suddenly became way more liberal with their energy usage, which actually increased the amount of energy used by the neighborhood. Proposed solution that worked? Sending a smiley face card to conservatives with a request to keep doing what they were doing, instead of pointing out they were at the right end of the bell curve.
  5. Too many options necessitate selection, and hence frustration, when brain decides it’s unnecessary work. The example here is given by a company that manages retirement funds for other companies, and hence has access to retirement information of 800,000 employees. When employees were offered a choice of 2 funds, roughly 75% signed up for a retirement program. When the number of funds was increased to 59%, even though qualitatively this was a better deal for employees, only 60% decided to sign up. When Head & Shoulders brand killed off 11 flavors of the shampoo, leaving only 15 on the market, the sales rose 10%.
  6. Giving away the product makes it less desirable. Researchers gave one group of people a picture of a pearl bracelet and asked to evaluate its desirability. Another group of people was given the same task, but prior to that was shown an ad, where the same bracelet was given away for free, if you bought a bottle of expensive liqueur. The second group considered the bracelet much less desirable, since mentally a lot of potential buyers (35% of them to be exact) shuffled the bracelet onto “trinkets they give away for free” shelf in their brain.
  7. A more expensive product makes the old version look like a value buy. An example here is a Williams-Sonoma bread maker. After an introduction of a newer, better, and pricier version, the sales of the old unit actually increased, as couples viewed the new item as “top of the line”, but old product was all of a sudden reasonably-priced, even though a bunch of features were missing.
  8. If a call to action is motivated by fear, people will block it, unless call to action has specific steps. A group of people received a pamphlet describing the dangers of tetanus infection. It didn’t describe much else. The second group of people got a description of tetanus infection, plus a set of instructions on how to get vaccinated. The second group exhibited much higher sign-up rate for tetanus vaccination than the first one, where many participants tried to block out the high-fear message urging that something as rare as tetanus would never happen to them.
  9. A small gift makes people want to reciprocate. People who received a small no-strings-attached gift from a stranger were twice as likely to buy raffle tickets from him than those who were just pitched on raffle tickets.
  10. Hand-written Post-It note improves response rate on inter-office letters. Researchers distributed three sets of questionnaires around the office. The first set included a hand-written Post-It note requesting completion of the survey. The second set got the same survey, with the request to return it hand-written on Page 1. Third group got the same survey with their name mentioned (in type) on page 1 of the survey. Response rates? 75%, 48%, 36%. People appreciated personalized approach, and somehow a Post-It note even highlighted the extra work that someone did before sending out the survey.
  11. How restaurant mints are a personalized affair. Let’s a say a restaurant provides mints for its customers on the way out. If the amount of tips per week is the baseline for that restaurant, let’s make the waiters include a mint as they give the check to the customer. The tips go up by 3.3%. However, when the waiters offer the mints themselves, prior to signing the check, the tipping amount went up by 14.1%. In yet another experiment, the waiter would present the patrons with 1 mint per guest, then give them the check, then turning around to leave, then, as if remembering something sudden, turning around and giving them yet another mint per guest. Result? 23% increase in tips, as this signaled high amount of personalization.
  12. Attaching no strings increases response to the message. Using the same hotel as the one mentioned in Chapter 2, researchers tried out two different versions of the sign. The first one: if you reuse the towels, a donation will be made to a nonprofit environmental organization.  The second version: the donation has already been made, since the hotel trusted you’d reuse the towels anyways. Recipients of the second message reused their towels 45% more than the recipients of the first one.
  13. As time goes by, the value of a favor increases in the eyes of the favor-giver, and decreases in the eyes of the favor-receiver. Researchers asked a group of people in the random office environment to exchange favors and then rate the value of the given/received favor in their eyes. A few weeks later the same employees were reminded of the favor, and asked to evaluate the favor again. Favor-givers consistently assigned higher value to a given favor, while as the time passed by, favor-receivers tended to assign lower value to the received favor.
  14. Asking for small favors changes self-perception, introducing ways for big favors. Researchers asked a group of homeowners to place a large “Drive Carefully” sign on their front lawn. Only 17% agreed. With the second group of homeowners, 76% of people were ok with road traffic people maintaining the sign on their beautiful lawns. What was the difference between two groups? A few weeks earlier group B was asked to display a small non-intrusive window sign asking drivers to slow down. This mental foot-in-the-door technique made homeowners from the group B view themselves as socially responsible and safety-aware, hence a request for a larger favor few weeks later didn’t startle them.
  15. Labeling people into a social group tends to increase their participation ratio. A group of people was interviewed regarding their voting patterns. Half of them were told that based on their response criteria, they were very likely to vote, since they were deemed to be more politically active. Later on the election day that specific half did indeed turn up a participation rate that was 15% higher than participation of the control group.
  16. Asking people to substantiate their decision will lead to higher commitment rate on that decision. Researchers called a group of people asking them how likely they were to vote in an upcoming election. Those who responded positively were either asked nothing, or asked why they felt they would vote. Any reason would suffice, but when the election day came, the turnout for the control group (who all responded “Yes” to the question of whether they were going to vote) was 61.5%. Turnout for the group that actually gave a reason (any reason)? 86.7%. A restaurant stopped telling customers “Please call to cancel your reservation” and started asking “Will you call and let us know if you need to cancel?” Net result? Number of reservation no-shows dropped from 30% to 10%.
  17. Writing things down improves commitment. Group A was asked to volunteer on AIDS awareness program at local schools, and was asked to commit verbally. Group B was asked for the same kind of volunteer project, but was given a simple form to fill in. 17% of volunteers from Group A actually showed up to their assigned local school. From Group B 49% of volunteers showed up.
  18. The fact that circumstances changed allows people to change their viewpoints without being viewed as inconsistent. People are generally not thrilled to change their viewpoints on something, as they fear they will display lack of consistency and be called a flip-flopper. Convincing people that their old decision (to stick with the old product) was completely 100% correct under old circumstances allows them to be more responsive to the messages that imply a new product/idea is better because the circumstances radically changed since then.
  19. Sometimes asking people for help makes them more open. Group A was given some bogus research that included a sum of prize money. After the experiment, the researcher approached them and asked whether it wouldn’t be inconvenient if they had to give the money back, since the researcher was using his own money. Group B was not approached with such request after their portion of bogus experiment was done, and was allowed to keep the money. After this both groups were asked to rate their impression of the researcher. Even though it was the first group who didn’t get to keep any money, all of them consistently rated the researcher higher on likability scale.
  20. Asking for little goes a long way. Researchers went door-to-door asking for American Cancer Society donations. Group A just asked for a donation, group B ended their spiel with “even a penny would help”. Results? 28.6% response rate for Group A vs. 50% response for Group B.
  21. Lower starting prices attract higher bids. This is a reference to a study of eBay items where people consistently bid items with a lower starting price higher. The explanation seems to focus on the fact that people invest more time into updating bids for a lower-priced item to let it go.
  22. How to impress a potential customer with credentials without being labeled as a show-off? Public speakers have someone else introduce them, a real estate company made a slight improvements to their phone service by directing people to “Jane, who has 10 years of experience with houses in upper price range”, and physicians display their diplomas on the walls.
  23. The danger of being the smartest person in the room. The expert card frequently trumps any other card in the room. The example here is that the scientists who discovered the double-helix of the DNA were never prime DNA experts, which made them “hungrier” for new discoveries, and made them question established rules.
  24. Devil’s advocate example works with large organizations. Leaders who consistently seek out dissenting opinions earn more respect, and generally have better agreement with people in the room than those who rule by laying down the law and persecuting dissenters.
  25. Negative examples are memorized better than positive examples. When one group of firefighters went through the list of real-life mistakes other firefighters have made, and another group just went through the list of positive things to do, the first group demonstrated better judgment when faced with real-life tests. Our brain seems to discount the best practices, but single out bad examples of someone else making a mistake.
  26. Admitting negatives up-front might lead to better communication. When Progressive says that they will compare your rate against their competitors’, and when original VW Bug was introduced in the US, both companies pursued a strategy of highlighting the negative stuff only to open conversation about the true values their product has to offer.
  27. Spinning negative facts as positive allows customers to make a mental link towards the positive. Among the viewers who viewed an ad advertising restaurant’s cozy atmosphere, an ad advertising the restaurant and lack of parking spaces, and an ad mentioning both, the third group made a connection between cozy atmosphere and bad parking situation. The restaurant was so cozy, the customers reasoned, that they didn’t even have enough parking spots, which made them even cozier in the eyes of a customer.
  28. Admitting you’re wrong makes people trust you more. Company A published an investors relations report, contributing slump in sales to overall economic climate. Company B said slump of sales was relevant to a few bad decisions by top management. Net result? Investors viewed company B more positively. You’d think that they’d be viewed as a bunch of screw-ups, but admission of a mistake made investors more confident the situation was under control, while company A investors got the uneasy feeling of the ship floating in the waters with captain losing control.
  29. Similarities raise the response rate. A person named Cindy Johnson received a survey request by mail from someone named Cynthia Johannson. Someone named John Smith received a survey from Gregory Jordan. The name similarity in the first case (note that it’s just phonetic similarity, none of the names are the same) brought up the response rate to 56% vs. regular 30%.
  30. People like the sound of their name, and that defines their vocation. There are three times as many dentists named Dennis as any other names. Number of Florences living in Florida is disproportionately high, same goes for Louises living in Louisiana.
  31. Verbalization helps interaction. Waiters who repeat customers’ order to them make 70% more in tips than waiters who just say “Okay”. Our mind subconsciously appreciates the effort taken to ensure the things are perfectly right.
  32. Just smiling makes for a poorer customer service. Group A was exposed to a hotel clerk smiling, while peppering the customer with questions regarding their preferences and ways to improve their hotel stay. Group B had just a smiling clerk performing her duties. Group B was more likely to rate the smile as fake.
  33. People pay more for the stuff that’s about to disappear. Oldsmobile sales rose after GM announced the end of life for the line. Australian beef purchases rose after customers learned this year’s supply would be severely diminished because of the weather conditions. Concorde sales took off right after British Airways announced the hyper-speed flights would be shut down.
  34. When people feel something is about to go away, they will stick to perception of the product being better than the new one. In majority of blind tests customers chose New Coke over Classic Coke. Yet when New Coke was introduced, massive protests were staged. When the same drink was packaged into Classic Coke and New Coke bottles, customers still claimed they preferred the Classic Coke and could taste the difference, even though labeling was the only thing that differed two drinks.
  35. “Because” makes any explanation rational. In a line to Kinko’s copy machine a researcher asked to jump the line by presenting a reason “Can I jump the line, because I am in a rush?” 94% of people complied. Good reason, right? Okay, let’s change the reason. “Can I jump the line because I need to make copies?” Excuse me? That’s why everybody is in the line to begin with. Yet 93% of people complied. A request without “because” in it (“Can I jump the line, please?”) generated 24% compliance.
  36. Asking people to choose reasons themselves might backfire. Two groups were given an ad by BMW. Group A saw an ad saying “So many reasons to buy a BMW. Can you name 10?” Group B saw an ad saying “So many reasons to buy a BMW. Can you name 1?” After the ad both groups were asked to evaluate their likelihood of buying a BMW. Similar to what’s described in Chapter 5, people who had to name 10 reasons actually named Mercedes-Benz, a competitive brand, as their probable choice, while Group B named BMW as their likely next vehicle, compared to Mercedes-Benz.
  37. People like stocks with more pronounceable names. Research of stock tickers between 1999 and 2004 looked at the relationship between the phonetic fluency of the stock and its rise through IPO, then 12 months later, then throughout its lifetime. The result? Stocks with more pronounceable names produced higher returns, even though nobody yells out the tickers on the exchange floor anymore.
  38. Rhyming makes the phrases more convincing. People were asked to evaluate the practical value of parables “Caution and measure will win you treasure” and “Caution and measure will win you riches”. In general proverb A was considered to be more practical and insightful than proverb B.
  39. Amount of information is context-dependent. A group of people was given an ad for department store A, extolling in great detail the 6 departments that A had. Another group was given a short blurb on store A, presenting mainly abstract information. After that store B was presented to both groups with information on 3 departments given to both groups. The first group thought they preferred A, since A volunteered more information and B seemed shadier in comparison. The second group did exactly the opposite and preferred store B, which volunteered detailed info on 3 departments, while A’s message was an abstract blurb.
  40. Incentive programs need a good start. A car-wash place gave one group of customers a free car wash after 8 washes, and everybody got their first stamp after their visit. Group B got a free car wash after 10 car washes, with 3 stamps on the card. Both groups needed to make 7 more trips to get a free wash. 19% of the Group A returned, while 34% of the Group B did.
  41. Abstract names allow the customers to come up with reasoning. Crayola found out that naming colors Cornflower Yellow and Kermit Green worked better than no adjectives attached to colors. The more abstract the connection, the better it seemed to work, as people spent mental time working out the connection between the abstraction and the product in their mind.
  42. Ad campaigns that do not incorporate brands tend to not be remembered. A good portion of people when asked which company was represented by a bunny and the phrase “going, going, and going” named Duracell as the advertiser. Duracell sales increased with the launch of Energizer Bunny campaign.
  43. Mirrors make people more self-conscious. A group of trick-or-treating kids was told to pick up one candy from the jar in the living room, while the adult was in a different room on some pretense. Group A had a large mirror placed by the candy jar, group B did not have the mirror. 8.9% of kids with the mirror in the room and 33.7% of the kids with no mirror treated themselves to extra candy. Another group of people was brought in for what was advertised as gel research, and was given a hand paper towel to wipe the gel off while heading for the exit. With the mirror in the hallway, 24% of participants littered, dropping the towel on their way out, with no mirror, 46% threw the paper towel on the floor without bothering to find a trash can.
  44. Negative emotions make people pay more. Group A was exposed to an emotional movie about the death of someone close to the main character. Group B saw no such movie. Both groups were asked then to name a fair price at which they’d buy the object presented to them. Group A tended to give prices 30% above Group B’s.
  45. Tired people tend to be more receptive to arguments. No wonder those magic bullet infomercials run so late at night. Both groups were presented to product demo, and then asked to evaluate the possibility of buying it. Group A was tired and a bit sleep-deprived, group B was in good physical condition. Group A was much more prone to buy.
  46. Caffeine increases the argumentativeness of a strong argument. Group A drank regular orange juice, group B drank orange juice infused with caffeine. Both groups were then presented with a statement on controversial issue. Except one statement then made weak and hasty arguments, while the second statement made a strong case. Both groups equally dismissed the weak argument case. As far as strongly argumentative case, group B was 30% more receptive. A faster-working brain under the influence of caffeine seems to appreciate good arguments.
  47. Face time still beats e-mail time. Group A was given time to get to know one another in person, then resolve a conflict via e-mail. Group B got a similar task, except no face-to-face communications. 6% of the Group As failed to come up at a good resolution, while 29% of Group Bs arrived at impasse.
  48. Individualism is perceived differently in many countries. In US and Western Europe a chewing gum campaign that accentuated “you, only better” seemed to get more success, than a similar campaign in Eastern Europe and Asia, with much more collectivism built into the culture. In those countries, emphasizing that chewing gum was much more tolerable for other people who can smell your breath, was perceived better.
  49. Notion of commitment among various cultures differ. A group of American students was asked to complete a short marketing survey. A few weeks later they got invited for the second survey, which was going to take twice as long. No pay for either survey. The same experiment was conducted among Asian students. The response rates among American students was 22%, response rate among Asian students was 10%. Research suggests that while American students relied only on their own experience, Asian students found out that few of their peers responded to the first request to complete the survey, which triggered their negative response.
  50. Response to voice mail differs among Americans and Japanese. When faced with a voicemail message, 50% of Americans, and 85% of Japanese hang up. Respondents from Japanese test group pointed out the personal touch of the conversation (intonation, pauses, volume) was important to them and impossible to reproduce over voicemail.

If you liked reading review of this book, check out my review of Predictably Irrational, which is written by a psychology professor and explores the topic of human irrationality in our perfectly rational world.

Mar 09

Quick CSS-based grids with Blueprint CSS

Blueprint CSS is a pretty quick way to design complex grids with CSS. The idea is basic – include the necessary styles, and you get a container for your site with fixed with of 960 px. So it’s not a universal solution, but at least if you’re comfortable with the width of 960, Blueprint will prevent you from giving up and using tables.

There are just 3 compressed CSS files to include, the third one is only for IE support.

<link rel=“stylesheet” href=“css/blueprint/screen.css” type=“text/css” media=“screen, projection”>
<link rel=“stylesheet” href=“css/blueprint/print.css” type=“text/css” media=“print”>
<!–[if IE]>
  <link rel=“stylesheet” href=“css/blueprint/ie.css” type=“text/css” media=“screen, projection”>

Then a simple container div will give you a centered area 960 pixels wide:

  1. <div class=“container”>
  2.   I am a container.
  3. </div>

You can attach any of your own styles to that container div, so I had an extra class that painted the container silver for better visualization.Blueprint CSS example - a single container

Let’s say we are going to need a header, a footer, a narrow right sidebar, a narrow left sidebar, and wide area in the center for content. Blueprint provides you with a bunch of classes ranging from span-1 for 1 column to span-24 for full 100% width. So for a full-width header and footer we create the following markup:

<div class=“container”>
   <!– header –>
   <div class=“span-24 header”>
   <!– footer –>
   <div class=“span-24 footer”>

What about the content area with 2 sidebars? With Blueprint CSS, your spans on one row have to equal to 24, so we can either do 1-22-1, or 2-20-2, or 3-18-3, and so on. 8-8-8 would get us a page equally divided into three divs. Let’s go the 2-20-2 route:

<div class=“container”>  <!– header –> 

  <div class=“span-24 header”>Header </div>

  <!– content>

  <div class=“span-2″>I am the left column</div>

  <div class=“span-20″>I am the main content area</div>

  <div class=“span-2 last”>I am the right column</div>

  <!– footer –>

  <div class=“span-24 footer”>Footer</div>


There’s another nuance to the markup above – the right sidebar has to have the last class. If I add some additional coloring to those divs, here’s a sample layout I’ve built with the code above:

Three - column layout with Blueprint CSSBut wait, there’s more. You can host divs inside divs without worrying about them overflowing. Let’s say we wanted to make the right column wider, up to 10 columns, which would make the central column become a span-12. And inside that right sidebar that’s a span-10 we wanted to host 2 divs per line, span-5 each, perhaps displaying an image, or a square ad. You can host two span-5 divs inside a span-10, or even a span-10 ad inside a span-10:

<div class=“container”>
   <!– header –>
   <div class=“span-24 header”>Header</div>
  <!– content>
   <div class=“span-2″>I am the left column</div>
   <div class=“span-12″>I am the main content area</div>
   <div class=“span-10 last”>
     <div class=“span-10 last”>Ads</div>
     <div class=“span-5″>I am some kind of ad</div>
     <div class=“span-5 last”>I am some kind of ad</div>
     <div class=“span-5″>I am some kind of ad</div>
     <div class=“span-5 last”>I am some kind of ad</div>
     <div class=“span-5″>I am some kind of ad</div>
     <div class=“span-5 last”>I am some kind of ad</div>
     <div class=“span-5″>I am some kind of ad</div>
     <div class=“span-5 last”>I am some kind of ad</div>

  <!– footer –>
   <div class=“span-24 footer”>Footer</div>

With some colorful background we get this grid:
Alternating ads in a sidebar with Blueprint CSS

There’s a pretty good quickstart tutorial on Blueprint github Wiki page. There’s also an example page that implements a somewhat complicated grid:

A sample page grid with Blueprint CSS

Sep 08

Startup2Startup dinner with Automattic

Matt Mullenweg and Toni Schneider of Automattic spoke today at Startup2Startup dinner in Palo Alto. Automattic runs this interesting model, where WordPress as software is distributed for free under GPL, but WordPress as hosting service is a freemium product. They charge users of the hosted service for some optional extra features, but do not insist on it. They also display occasional ads on hosted free blogs, as Toni Schneider put it, to the users who are likely to click on them – IE readers arriving from search engines.

Some takeaways:

  1. Matt is a great supporter of GPL. Not only from philosophical standpoint, but from practical – it requires people to contribute back, and hence build community.
  2. Don’t hire all the contributors, once you have the company started. This will ruin the community effect, as evidenced by MySQL. You also gain outside perspecives by having contributors working for different companies.
  3. By open-sourcing the founders effectively lose the iron grip. Even people who have commit access now have to go through a discussion in bug system.
  4. WordPress benefits greatly fro having all the developers work from home. More time spent with families, more efficient developers, who can take an after-lunch nap. The company is run via IRC channel.
  5. Automattic will even help you with scaling, if you’re a large organization adopting WordPress. You’re unlikely to surpass their scale, and they’ve been where you’re now, so they know what works for scaling out.
  6. Personal relationships matter a lot. So Automattic still has twice-a-year meetings of the entire team. Early developers were all people Matt knew personally – personal connections help out a great bit in a virtual organization.
  7. WordPress really started taking off as open source project with introduction of plugins and themes. It’s easy to develop both, and most of the WordPress installations run roughly 5 plugins, and it’s long-tailish.
  8. WordPress as a project did not do a good job early on maintaining the directlory of plugins and themes. After opening up SVN for plugin developers, the plugin directory got traction. Designers did not quite catch on to SVN, so Automattic had to provide a way to drop a zip file onto the site.

Thanks to Dave for organizing all this, and I specifically liked the after-dinner table discussion. It’s very structured – 8-10 people at a dinner table, a few VCs, a few entrepreneurs, a few random people, and a moderator. Moderator comes to the dinner with discussion points prepared, and ensures each guest has a chance to speak. After all the structured discussion is out of the way, it’s time for anybody at the table to ask any question, which some entrepreneurs used to gauge interest in their startups and gain feedback on business models.

The dinner table discussions are off the record, so can’t blog about those, but there were some pretty interesting companies – mjam, Get Satisfaction, and others.

Aug 08

Book review: 13 things that don’t make sense by Michael Brooks

13 things that dont make sense 13 things that don’t make sense by Michael Brooks is a pretty interesting look into the world of scientific discoveries, or lack thereof. Because, you see, there are quite a few commonplace things that we take for granted, but cannot quite explain from the scientific point of view. Sure, you’ll say, it must be some extra-hard scientific stuff, a formula understandable only by an army of advanced PhDs who spend their lives figuring out these ultra-complicated tasks.

Well, not quite. It turns out that life itself is quite a mystery from the scientific point of view.

  1. Life. In theory life in the universe appeared when electric currents went through the masses of hydrogen, ammonia, water and methane, therefore creating something animate out of a set of inanimate chemicals. In practice, for a few decades the scientists have been trying to achieve a similar effect on a smaller scale, but so far no one has been able to produce the Holy Grail – turning something lifeless into something that is actually live, such as a single-cell organism. The life itself, it seems, is a scientific anomaly that should not happen in this Universe according to the existing laws of chemistry.
  2. Death. You’ve heard it before: two things you cannot avoid in life are death and taxes. Well, this is a very human-centric view of things, as it turns out there’s a variety of species (most of them vertebrates) that only get better with age. Some turtles, it seems, only get healthier and produce more children with age. Moreover, scientists are aware only of non-natural causes of their deaths – being run over by a truck or attacked by a bird. Are those turtles immortal, or are we observing just a small stage of their lifecycles (which could eclipse ours by generations)?
  3. Dark matter. It’s not embarrassing for scientists to admit they don’t know something. After all, there are plenty of little details that remain unknown in many branches of science. So not knowing what constitutes dark matter would be an acceptable excuse, if it weren’t for the fact that dark matter comprises 96% of the Universe. We know that the Universe keeps expanding, but we cannot quite describe how and what happens to the space that used to be compacted previously. Dark matter is the giant elephant in the room in discussions related to astronomy or physics – we don’t know what it is, we’ve never seen it, and only infer its existence, yet roughly speaking it’s a major ingredient in the Universe we live in.
  4. Varying constants. Physical constants are warm and fuzzy. We don’t know why they have the value they have, but we always substitute them into our equations and formulas, relying on decades of scientific research behind us, and the fact that they are, well, constants. However, there’s a fairly determined group of scientists that is looking into certain scientific constants and finding that their values have changed as the Universe aged. Determined might be an understatement, as anyone willing to travel to Gabon and mess with uranium there is certainly dedicated. What they’re finding is that the constants describing nuclear reactions were different two billion years ago compared to current constants.
  5. Newton’s inverse square law. In 1994 scientists at Los Alamos National Laboratory figured out they had a bug with Pioneer probes. Contrary to the Newton’s inverse square law, the Pioneers were drifting off course. They hired Slava Turyshev out of Jet Propulsion Lab to investigate the small bug, which was most likely to blame on some contamination or error in Pioneer design. 14 years later the bug still stands unresolved. Together with NASA the scientists have gone through heaps of papers figuring out what could go wrong, and the answer is still up in the air. If unresolved, the Pioneer trajectory might become the first evidence that it’s time to rethink Newton’s inverse square law.
  6. Homeopathy. When it works, you hear all about it. Homeopathy is almost like religion, in the sense that it attracts either staunch believers, or extreme sceptics. The idea of diluting a certain ingredient with copious amounts of water doesn’t sit well with the majority of chemists, who point out that such small proportions call for a chance of the entire solution being water. Nevertheless, in Brooks’ book there’s an attempt at the explanation of what might be causing homeopathic effect – changes in molecular structure of water depending on the chemicals that it’s been in contact with, even if the chemicals have been filtered out. However, it’s still an attempt at best, since the scientific experiments that do achieve positive results are generally not reproducible.
  7. Placebo effect. Perhaps related to the previous thing we don’t understand, placebo effect has some interesting features. The patient knowing or suspecting that they might be receiving a placebo behaves differently than those without any knowledge. Are we comforted by the sight of people in white robes and our local pharmacist dealing out the regular dose of medication? Or does body start producing entirely different set of hormones with mind suspecting that the recovery process is near. Placebo, if figured out, might become a huge money saver with the current drug prices, and hence attracts scientific research. The only thing missing? A definitive conclusion on the placebo effect.
  8. Free will. A certain amount of human ideology rests on the idea of free will. So the idea of the body just reacting to some responses outside of the brain is uncomfortable. But picture this. You’re in bed, it’s time to get up, yet you want to spend a few more minutes in bed. Your conscious mind is sending the signals for the body to get vertical, and yet at some point, probably between the thoughts of pending shower and commute to work, you get up. The final decision done by something unconscious, something you don’t really have control over. While your conscious mind can submit an application to this unknown organ and request something happening, the body movements and behavior are triggered by something that is still largely unknown for science.
  9. Cold fusion. It became one of the most ridiculous scientific ideas to get associated with, and no scientist would touch it nowadays with a 40-foot pole, since it brings the stigma. However, as some point out, peer pressure is pathway to missing out on some potential innovations in the field. What’s currently reproducible is the effect of cold fusion on a plastic called CR39. Placed by a piece of depleted uranium, CR39 shows similar patterns of radiation as placed into a cold fusion experiment.
  10. Life on Mars. The Viking probes were declared to contain no evidence of life on Mars. The only person in the room who disagreed with the announcement was a bacteriological researcher, who came up with a clever idea of detecting life (fart reference coming soon). By adding radioactive isotopes to the nutrients fed into the foreign soil, the researchers would get any evidence of carbon-based life to produce gas (there it is), and by the virtue of having the food injected with isotopes, the Geiger counter would go ballistic, and hence you could validate existence of life in the soil, even if other tests came negative.
  11. WOW signal. One would argue that scientists at SETI (Search for Extra-Terrestrial Intelligence) have a pretty monotonous job. They’re waiting for a signal on 1420 MHz frequency. Why 1420? That’s the frequency of hydrogen, the most prevalent element in the Universe, so hopefully those extra-terrestrials will arrive at the same idea when sending the signal. So far no signal has arrived. Except on August 15th, 1977, when the signal came. It was very distinct, and caused Jerry Ehman to write "Wow!" on the margin of the printout. The signal never repeated, and the SETI folks have not heard anything similar since then.
  12. Mimivirus is an interesting virus that does not seem to affect humans, except for the unique cases, when it actually does. It’s the virus that fight cancer cells among others, and hence draws a great deal of research attention.
  13. Sex. If you’ve read this far, here’s a bonus entry. Yes, sex is one of those things that scientists do not quite understand (insert a proper nerd joke here). Looking at overall picture, the animal kingdom provides a great variety of alternative means of reproduction, that are much more efficient as far as number of offspring and the quality of gene preservation. A number of reptiles and fish are all-female or all-unisex species, copying themselves for the purposes of reproduction. Moreover, a number of species, like water fleas, can reproduce either sexually or asexually. You’d think that the species produced through asexual reproduction would be somehow inferior to the ones that appeared as a result of a sexual act, but there’s no solid scientific data to prove that or the opposite. What remains enigmatic is that if asexual reproduction would provide you with 2x the population compared to sexual (and that leaves out the time and energy spent on finding a mate, taking her to dinners and consequent ring shopping), why didn’t the entire animal world switch to asexual, as it’s obviously a more efficient process.

Aug 08

Daily deal sites like Woot

Jul 08

A few things about fair trade coffee

image I am reading Starbucked by Taylor Clark, and the book is quite enjoyable, both as a look inside the coffee industry, and as a business case study of Starbucks. Clark dedicates an entire chapter to fair trade coffee practices, that I wasn’t too familiar with, but as anybody else, assumed it was a Good Thing. Fair trade coffee practices, controlled by a non-profit TransFair USA, pay farmers participating in the program $1.26 a pound for regular coffee, and $1.31 for certified organic. Under the fair trade label it’s resold to you at $12-15 a pound, making the retailer quite a winner in this transaction (originally fair trade was supposed to eliminate the middleman, and thereby lower the final cost of coffee).

When the price of coffee beans can occasionally go under 40c, this seems like a good deal, if you’re a coffee farmer, so what’s the catch?

  1. Fair trade contracts are binding, and requiring the coffee bean farmers to commit to $1.26-$1.31 even if market surges (as it does when there’s a cold summer in Brazil). Ok, this is a bit hypothetical, but coffee markets have been known to swing wildly nevertheless. In 2006 Starbucks (the largest seller of fair trade coffee in the US) has actually paid its non-fair-trade growers an average of $1.42 per pound. Oops.
  2. TransFair requires that each coffee farm participating in the program be coop-owned and employ no outside seasonal labor. This rules out private farms, family-owned farms, and corporation-owned farms. A family of coffee bean growers starts out a farm, hires seasonal labor to pick the beans, and wants to sell it as fair trade coffee? TransFair doesn’t let those capitalist pigs get anywhere near the application form.
  3. Roasters admit that fair trade coffee is of inferior quality. While the rest of the coffee farms have to compete in lower-priced open market, they frequently do it by quality of their product. When a fair trade farm is guaranteed $1.26-$1.31 a pound, the economic rationales start to take over, and growers always try to cut their costs to enjoy higher profit margins.
  4. TransFair requires every participant in the fair trade program – retailer or coffee grower – to sign a release form promising never to criticize the program in public.

Dec 07

The Black Swan

Black swanI just finished reading Nassim Nicholas Taleb’s The Black Swan: The Impact of the Highly Improbable. I enjoyed Fooled by Randomness by the same author, and Black Swan has a few references to his previous work. In the previous title Taleb discusses a typical human mistake of taking the result of a random outcome for skill or deserved result. In Black Swan, Taleb discusses traditional models for forecasting anything (financial markets, political scenarios, weather), and theory of chaos, which basically says that systems with high entropy cannot provide any degree of predictability.

Political analysts of the late 80s did not predict the collapse of the Soviet Union, financial markets of the 21st century did not predict Russian default with subsequent sweep on Asian markets, and security analysts did not predict two planes flying into the towers of World Trade Center. However, in the retrospect, we tend to exhibit surprising hindsight, stating that all those events were inevitable, due to [insert a variety of geopolitical arguments here].

Taleb insists that the human mind frequenty:

  1. Overestimates the odds of success when applied to oneself. Everybody buying a lottery ticket mentally assumes a much better probability of winning than reality usually presents.
  2. Attributes random events in the past as contributing to success/failure. Survivors of the shipwreck would tell the story of how they all prayed for their lives, and thus got saved. While some religious groups would tend to pick up the story as the proof of whatever agenda they’re pitching, nobody generally listens to the stories of those who prayed, but still drowned. Business journalists (with CBS MarketWatch being the worst) frequently abuse this by pitching headlines like Stocks down after Congress increasing military spending in the morning, and Stocks up as Congress approves larger military budget in the afternoon.
  3. Looks for order and sequence where it doesn’t exist. Business book writers made a cottage industry out of this by surveying the life stories of prominent individuals, and then reselling those as recipes for success. The quirkier the trait, the better it suits the public. Peter Thiel wakes up early and runs in the morning – I see, so that’s a secret recipe for running a successful hedge fund.
  4. Listens to the experts that don’t know any better. There’s a whole bunch of occupations, where expertise is learned, and re-learning it requires significant time investments. Mechanics, doctors, and foreign language interpreters all have such skills. Other kinds of expertise involve looking back at what happened and trying to draw the line of correlation among discordant and random events. Such experts involve financial analysts and government economists.
  5. Hungs up on small things without seeing the big picture. If you have significant money in savings accounts, you’re probably busy looking for a better rate. However, the bigger picture, the Black Swan of the US banking industry, is significant asset consolidation among major banks. If one of them gets hit, all of them get hit significantly. The possibility of over-exposure to subprime loans and possible collapse of the banking industry generally escapes the model that your financial analyst presented.

The book is pretty interesting, but hardly coherent. Nevertheless, it’s full of interesting anecdotes and personal observations, that make the book somewhat witty. After reading it I went around reading some other reviews – NYT seemed to not like it, Fool.com did a pretty comprehensive review of the points presented, Slate reviewer seemed to like it. There’s also author’s interview on Colbert report.

Dec 07

The starfish and the spider

Starfish and the spiderFor a highly acclaimed book, according to the number of accolades on the back cover, The Starfish and The Spider is surely repetitive, but makes for a quick read. In a nutshell, the author applies the analogy of starfish and spider anatomy to the corporate world. While spider has many legs growing from the center, cut off its head – and the whole organism falls dead. With starfish cutting off one of the legs won’t achieve any fatal scenarios – you will just get two starfish organisms, as the anatomy is completely decentralized. Apply that to the corporate world, and you have two kinds of companies – one where the head directs everything, and such organization, when made headless, turns into chaos. And a company where every employee is so autonomous, that removing the person on the top, as well as layers of management organization would damage the organizational body somewhat, but won’t be fatal.

Authors take a look at Kazaa, Skype, Alcoholics Anonymous, Craigslist, Wikipedia, eBay, Apache Indian tribes, and Toyota as examples of successful decentralized organizations. Successful in different respects – The eMule Project, covered in the book, doesn’t earn any revenues per se, but manages to sustain all sorts of attempts to exterminate it. Wikipedia is not a money-maker either, but undoubtedly successful as far as the quality of content is concerned. With the Toyota example, the authors point out GM’s Fremont, CA plant as an example of highly centralized, and unsuccessful, project management approach, and compare it to Toyota’s decentralized and highly autonomous approach, where bottom-up innovation is welcomed. The case of the auto plant was apparently covered in the movie Gung Ho, but haven’t seen the movie, I can’t really comment on that.

The authors fill some pages with interviews with Craig Newmark and Jimmy Wales. Valuable content otherwise, it doesn’t really add much to the book – we learn that Jimmy Wales doesn’t do any article editing himself anymore (so they’re even more decentralized than you might have thought), and that Craig Newmark is very user-centric and responds to customer support e-mails. The authors also make a passing remark on the cases when the centralized structure is preferred (U.S. Army, commercial airline, etc.), but don’t really expand on this point, so you’re sold on the idea that decentralized management is applicable to every single company out there.

Sometimes the authors seem to confuse decentralization with just employee empowerment. They quote Jack Welch and current GE as an excellent example of decentralization, while in reality it looks like the corporate structure is still pretty rigid – employees just got motivated to make more decisions themselves, instead of relying on management to tell them what to do.

Overall, the book exposes a good idea, but seems to be hung up on the idea of making the right number of pages to publish a book. Reading this review provides a pretty good overview on what to expect in nine chapters.

Oct 07

What I learned about timeshares, and you can, too

Last weekend my wife and I spent a weekend in Las Vegas, with the cost of the hotel partially offset by having to visit a time share presentation. Anybody who has hit a certain income level has probably received a call from a timeshare company at least once, offering a free vacation, free hotel stay, or some other nice-sounding perk in exchange for visiting a “no-strings-attached” presentation. There’s nothing wrong with signing up for those perks, as long as you know what to expect, and what to do during one of those presentations. Here’s some random tips that I gathered after attending a few of those.

What are timeshares?

Whenever a real estate developer builds one of those nice towers in a highly touristy place like Orlando, Las Vegas, San Diego, etc., they would like to sell those condo units to interested parties. However, unless you happen to live in a highly touristy place, your interest in purchasing one is probably quite minimal. Spending vacation there, however, is another story. Hence the timeshare company breaks up a single condo ownership into roughly 50 weeks. Buying a timeshare entitles the owner to one week at the aforementioned property, with 1-2 weeks of the year left for various maintenance work, like replacing the carpet, or installing a new dishwasher.

Ok, I get it, so you buy a week?

The weeks sold can be of different variety, and sell for different prices. It’s a no-brainer that being in Las Vegas for New Year’s or at Lake Tahoe in the midst of the ski season beats Las Vegas in July, or vacationing in Florida during hurricane season. Not all weeks are created equal, and companies selling timeshares know that. They apply different pricing to their weeks, marking them as peak, high and low season. Naturally you pay less for a low season week than what you pay for a peak week.

Some trickier ones (like Westgate) tell you that they’re selling a floating week – the week you can use whenever, as long as you call the company in advance. The trick here is that the concept of peak weeks still exists, and you’ll be charged extra for it.

Some get even trickier, and sell you points. Points are assigned to your account, as you’re making your regular timeshare payments, and they generally seem lavish, as you’re told that you’ll be given 500,000 points each year, which you can then use to reserve the weeks and properties you’re interested in. Naturally, peak weeks cost more points, and generally the only way to get more points is either to skip the vacation this year, and let those points accumulate, or pay up to get more points.

Wait, did you say you could reserve other properties?

As going to the same spot will eventually get tiresome, timeshare companies are doing two things to add variety to your future vacations.

Number one: you can generally work out a deal to stay at a property belonging to the same company, if someone else wants to exchange. This might or might not cost extra, and usually involves calling the company, and letting them know which one of their other properties you’d prefer to visit. During the presentation the sales rep will make it seem as easy as it can be, but note that generally everybody wants to take their vacation during the peak seasons, nobody wants to go on vacation during a dead season. So when you call up the company and tell them you’d like to exchange your Orlando time share for a week in company’s San Diego property, people who own that timeshare in San Diego get a higher priority than you.

Number two: there are brokers on the market, like RCI or Interval, which work out deals for timeshares belonging to different companies. They charge for their services, as they’re not affiliated with the resort developers, but they do allow traveling internationally, since their directories generally include thousands of participating resorts.

What you will be told at a timeshare presentation

  1. The general script of any timeshare presentation I’ve been to starts with the sales rep asking the couple to list their favorite vacation spots. You’re told that this will be used for research on where to build next vacation spots, and those destinations will reappear in the conversation, as the sales guy as making a pitch on exchange programs (see above). If you feel like disrupting that part of the presentation, tell them your vacation destinations for the near future include Nepal, Greenland, and Iraq.
  2. You will be asked about the vacations you took. From here the script diverges two ways. One – the easiest – is if you haven’t taken any vacation, obviously money is the problem, and the timeshare company is here to help. Second – you list the vacations or trips you took over the past 12 months – involves tedious calculation of how much you spent for it.
  3. This is where it gets interesting – you will generally be asked to quote the entire price of vacation. In future comparisons these numbers will be used to compare with timeshare costs, and how much money you could’ve potentially saved, but you’re rarely asked to break down the price of airfare, hotel, and attractions. Most vacations are bought as packages, so rarely you have a clue as to what the exact cost of the component was. Usually you and the sales rep begrudgingly agree that you probably spend $180-200 for that hotel room.
  4. If you spend two 6-night weeks on a vacation every year, that means $2,400 of your budget goes towards paying for a hotel (12 nights at $200 each). So far so good. So what’s that going to be over the next 25 years? Well, you say, looks like $60,000 to me. And are the prices of hotels going to decrease or increase, asks the rep. You’re no fool, you know inflation theory, and you’re pretty sure it’s only going to increase. Is it fair to say that the prices of hotel rooms will be double of what they are now in 25 years? Year, pretty reasonable. Boom! Your sales rep multiplies everything by 2, and you’re obviously going to spend $120,000 on just hotel stay in the next 25 years. I will let you figure out what’s wrong with multiplying the whole sum by 2.
  5. At this point you’re probably indignant at hotel companies and yourself. Well, it turns out, your sales rep informs you, that you never get that money back. You’re just giving the money away without getting back anything, but a bag of receipts. You’re renting your vacation, spending $120,000 on it in the course of the next 25 years, and receiving 0% return on investment on that money.
  6. Introducing the concept of vacation ownership. Each timeshare company claims to have invented this, and according to sales rep, it’s only due to the goodness of their heart, helping doofuses like you and me save that $120,000 over the next 25 years, and also get something back in return. For something like $150 a month, you can be a proud owner of your vacation.
  7. At this point it totally makes sense. Why throw your money away to evil hotel companies, when you can be an owner of your own week, be able to own it forever, and gift it to your children, if you choose to (this concept of gifting or willing comes up often).

So why doesn’t it make sense?

The financials presented sound pretty good, right? Generally if you look at the pure numbers, they come to around $60-70 a night, generally pretty competitive rates when you line up the hotels in the same area. Well, the secret is that there are two kind of fees – your timeshare payments and maintenance fees.

The payments go towards collateral and interest (if you chose to finance), the maintenance fees go towards hiring people to maintain the resort (duh!) While your monthly payments are set in stone (a contract, that is), maintenance fees fluctuate from year to year, or so you’re told. Well, unless you’ve witnessed a strike of maintenance workers asking for lower wages, there’s only one way they can fluctuate – up. Those fees are applicable even if you decided to skip vacation for a year, either due to time constraints, or desire to accummulate points. Also, maintenance fees never go away. Even if you’re completely paid up on your timeshare payments, the maintenance fees still have to be paid. If you gift the paid-off timeshare to anybody, they will be stuck with maintenance payments set by the resort.

Another highly objectionable technique used by timeshare companies is points inflation. As the years pass by, and you keep paying stable payments and rising maintenance fees, you will find out that either you get fewer points for your money (few companies do this, as this is pretty obvious attempt) or things cost more and more points, requiring you to buy up some extra ones each year. Combine the payments + maintenance fees + any points fees or any peak/high week fees, and you’re most likely looking at $150-200 a night, the exact price quoted to you by the sales rep, only in reference to the evil hotel industry.

So does it ever make sense to buy a timeshare?

Generally the high dreams of getting any return on investment never materialize, as deteriorating properties require higher maintenance fees each year, and there are always more people selling timeshares than buying them. However, does it make any sense to get one?

  1. It seems to be a reasonably good deal for large families, or families taking vacations together. Since most of the timeshares can accommodate two families, in price comparisons you’re looking for 2 hotel rooms or hotel suites, which generally cost much more. But even then, your costs may very.
  2. It seems to make sense if you have any recurring travel. Every year I go to a conference in Las Vegas that always happens to be during the same week. But even then a timeshare would not make sense for me – the week is in August, when hotel rooms are cheap, and the conference might move to another location, which would imply getting a different hotel that year.
  3. If you happen to have a week in a property that someone else wants to buy out, you might make some money. But even then the investment return will most likely be obliterated by various fees attached by timeshare resorts.

When you think that getting (or not getting) one might make sense for you, make sure to check eBay Timeshares, Sell My TimeShare Now, or places that rent timeshares just to get sense of the going market rate. From reading the forums, it looks like the biggest mistake one can make (outside of buying a timeshare) is buying it retail as a result of a high-pressure presentation, that has a special rate going on that’s going to expire today (isn’t that convenient).

Another good place to do some reading is tug2 – forums for timeshare owners, run by people who actually bought timeshares, not companies that sell them. There’s apparently also a huge market to get rid of timeshares, and Timeshare Relief is the primary buyer for those. Most of people unloading timeshares are willing ti give them away for any price, just to get rid of high maintenance fees and property taxes, and hence you can frequently get a bargain if you’re looking for a secondary market timeshare. Vacation Rentals by Owner site will give you a good idea of what the vacation spots rent for in the markets you’re looking at – would suck to get a timeshare costing you $2,000 for the week, when larger vacation houses rent for half the price at the same location.

Oct 07

Ping your Web site from 11 locations around the world

Over at dot-com monitor they have a neat tool that allows a Webmaster to check their ping from 11 locations throughout the world. GET parameters, POST parameters and custom headers are supported, as well as HTTPS sites and passworded logins. They also have a stress testing tool, but that one they sell.

Global ping from around the world

Sep 07

The Naked Guide to Bonds review

I always wanted to learn more about the bond market. While the stocks are pretty straightforward, bonds always have this air of mystique around them. Yields, treasury rates, bid and ask spread, ability to avoid taxation – it seems like there’s a special little market of its own. The Naked Guide to Bonds by Michael V. Brandes provides a pretty good and straightforward explanation of how the bond market operates.

US bond market lacks the degree of transparency that US stock market has, and since there’s no New York Bond Exchange, there are certain peculiarities a bond investor should consider. Some of the bond offerings are hard to sell, as they’re generally targeted towards the buy-and-hold crowd that wants fixed income, not opportunities for trading. Nevertheless, the bonds are traded, with prices determined by interest rates and market demand. Since most of the institutions in the market operate with the budget of $1 million and above, there’s actually a separate submarket for anyone trading in the lots of fewer than 1,000 bonds (pretty much all of them are priced at $1,000 to make at least one factor comparable). Effectively you might have two separate markets with two different prices quotes for the bond – a market for institutional (above one mil) and small investor (below one mil) trading. Bad news is that smaller investors get penalized, as prices for buying and selling bonds favor large institutions.

One of the reasons you might be looking into the bond market is tax-free municipal bonds, which are exempt from federal income taxes, and exempt from the state income taxes, if the bonds you buy belong to the same state you’re in. Municipal bonds, typically with lower yields than corporate or agency bonds, typically include the buyer’s income tax bracket in calculating the total rate. The bad news is, as mentioned above, most of the municipal bonds are issued for the period of 20 years, and if you need to sell them before the deadline arrives, you might be stuck with an offer, on which you’re losing the money, since the market is not that saturated. It’s also important not to make a mistake of getting municipal bonds for an IRA account – you’re giving up high yields for no income taxes, but since IRA income is already not taxed, tax-free municipal bonds generally do not belong in retirement accounts.

The book is easy reading. Not light, but definitely straightforward if you’re paying attention to what has been described in the previous chapters. The author then discusses some strategies that might be applicable to the reader, and talks about the common pitfalls, such as chasing the yield, or having no sense of direction in the bond market. Among online resources worth checking out, InvestingInBonds is perhaps the most well-known official resource. Yahoo! Finance also runs a bonds center with basic market data and some tutorials on bond trading. Bloomberg bonds center offers some news feeds for the market. MunicipalBonds is also a great site for researching one particular subset of the bond market, providing both research and news on new offerings.

Jul 07

Fooled by Randomness

Fooled by RandomnessNassim Nicholas Taleb’s Fooled by Randomness explores a quite interesting idea of how frequently we confuse causation with pure randomness exhibited in nature. We tend to rever successful war generals, coaches, and corporate CEOs, studying their strategies in search of recipes for success. Success, as Taleb infers, can frequently be attributed to a totally random sequence of events.

Suppose that you have a group of 1,000 who are ready to play a game of Russian roulette once a year, with their chance of survival at 80%. You would have 800 people left after the first year, 640 after the second year, 512 after the third year, and so on. Sooner or later the randomness of the game would bring you to the point, where you had a dozen or so people left alive. Are they really good at plying Russian roulette? Do they have some winning strategies for beating the game? Should we study their family history and consult with their parents on upbringing, so that we can have more of their type? It’s pretty obvious that their path to success in this case was completely random – someone had to be among the final dozen, given the probabilistic chances of Russian roulette, and it just happened to be them.

Change the rules of the game from Russian roulette to financial markets, and all of a sudden the remaining few are treated as financial geniuses with “proven track record” and unblemished reputation. This is frequently one of the randomness scenarios that human brain tends to attribute to some past events having a historical value on influencing the present status quo.

Not to say that success is completely random. When you look at the world of financial markets, somehow one can bet that a Harvard business graduate with superb math skills and understanding of international markets will do a better job on Wall Street than a bum from Calcutta. It’s also quite expectable that a dental student graduating at top of his class from a top school is most likely to do pretty well (financially) in life. Randomness? Or deterministic behavior? Taleb argues that one can always position himself to get a better head start at an occupation, but unless you’re an Olympic runner, randomness has probably a higher role in determining your success, than skills set.

But the book is not about “defining your future.” It’s more about common misconceptions that we have about success. Most of the actors work as waiters, and most movie script writers work at fast food. Yet the public tends to perceive the job as highly desirable because of the slim majority, who actually reached the top of their profession. Human brain tends to underestimate the chances of success, when the potential payout is so large, that it outshines the rest of the 99.9%.

Jun 07

Java jackets and Jay Sorensen – the history of invention

Java jacketsEvery time I get a cup of hot coffee, I am always curious about the coffee sleeve, usually featuring the patent 5,425,497. It’s a pretty simple, yet incredibly useful invention that obviously was scratching an itch that many people have had whenever buying hot coffee.

The inventor is Jay Sorensen and the one-product company is Java Jacket out of Portland, OR. You get the coffee sleeve for free whenever you buy a beverage at a coffee shop, but according to Entrepreneur magazine, the company’s revenues were estimated at $12-15 million dollars back in 2003. The company got started with $15,000, back in 1993 when the patent got granted. The venture got started after an unfortunate accident with hot coffee, Fast Company magazine says:

One morning, I spilled the coffee in my lap. I didn’t get burned badly, but I thought, Maybe there’s a better way of doing this. 

Jan 07

Review: The Paypal Wars by Eric Jackson

If you made an online payment any time within the past decade, you have probably used a Paypal account to send the money. If you’re an Internet “power user”, you probably remember the time, when Paypal was free, promising to make the money off the float on the accounts, the times when free credit card payments were limited to a certain amount per month, and then a time when all the credit card services for sellers started included commissions.

If at any time you dealt with Paypal, you’re probably left wondering:

  1. How did eBay with all its market power failed at promoting its own BillPoint venture and killing Paypal meanwhile?
  2. How did Yahoo! with its tons of users and user-friendly interfaces fail to promote Yahoo! PayDirect and kill Paypal meanwhile?
  3. How did Citibank with its decades of banking and payment experiences and reaches into millions of households fail to establish c2it as primary online payment platform and meanwhile kill Paypal?
  4. Are the stories on Paypal wall of shame true or have any merit to them?
  5. Is Google’s Checkout a viable alternative to Paypal, or without person-to-person payment its bound to remain a niche product?

The book, written by Paypal’s interim VP of Marketing (the interim part got in there after eBay acquisition), provides quite a few answers, providing insight into tumultuous history of an Internet startup that was fighting off startup competition, online giant competition, international fraudsters and Planet Earth in general.

The author describes his recruitment process and starting with a pretty small team down on University Avenue in Palo Alto, the same place that previously served as a launching pad to Logitech and Google. Apart from the engineers, few people hired for early Paypal were hired based in their previous experiences, and Eric Jackson starts off with a marketing career at online payment company without any previous knowledge of marketing field.

At the early stage Paypal was pretty much defining itself as a business. The original model of sending electronic money from PDA to PDA didn’t seem to be materializing too soon, as penetration of those early days Palm Pilots left much to be desired. E-mail penetration, however, was beating all the records, and soon Paypal found itself competing with X.com, dotBank and companies with similar business models.

The author spends a great deal of pages portraying Paypal’s Big Idea – ruling the world’s personal markets, therefore enabling commonplace citizens to get better control of their money. Quite frequently in places like Argentina, Indonesia or Russia the government chooses to devalue the currency, and the ones who are hit the hardest are the poorest and middle-class citizens. With no real estate investments, most of their life savings frequently resides in savings accounts or large wads of cash stored under the mattress, and hence rampant inflation tends to enrich the political elite, while ruining the financial stability of helpless citizens.

Paypal’s merger with X.com is described at good level of detail, but unfortunately Jackson did not have access to the board room during the merger, and hence unable to render all the juicy details that usually accompany startup mergers. Jackson, however, was part of the group involved in ousting Elon Musk from the CEO’s position, and the tensions are described in great detail. The quickly evaporating competition also deserves only a passing reference in Jackson’s book. While insignificant in the hindsight, it’s still interesting to find out why Yahoo! and HSBC could not turn PayDirect into a successful venture, or why Citibank closed c2it.

Graduated from the early stages, Paypal has only two formidable opponents to fight – BillPoint, a joint venture between eBay and Wells Fargo, and international criminals, who are pretty excited at the opportunities presented to them by Paypal, where stolen credit card numbers can mysteriously be converted into cash and sent to a “pal”. The war with BillPoint is described in great detail, sometimes feature-by-feature, as it was the pinpoint of Jackson’s career, with the author being responsible for customer communication and for producing those nifty comparison tables butting BillPoint and other competitors feature by feature.

The relationship with eBay surrounds pretty much any chapter of this book. Early on Paypal became the vehicle for the nascent industry of online auctions, and while eBay focused on its core competency (providing Internet users with a platform to buy and sell products), Paypal focused on its (moving money between registered users). Turns out, online payments was the first area of expansion for eBay, and throughout its corporate life Paypal tried to fight off competition from its major benefactor, while enjoying most of the traffic and signups from eBay auction. To be fair though, Paypal’s success was driven not by eBay’s ineptitude, but by loyal and active user base, who was the company’s best defender, whenever eBay tried yet another trick to default its users into BillPoint’s payments.

The technical side of fighting fraud gets a few paragraphs in the book, but besides some mysterious descriptions of Max Levchin’s and team’s workings, little light is shed on all the drama that went into fighting international fraud. Overall, the book does lack a great deal of technical detail, but if you know that it was written by a marketing employee, and not an engineer, it’s expectable. Paypal Wars does, however, read like a detective story, primarily because the young company seemed to have an endless supply of crises and fights to overcome. With the book written like an action hero novel, the end (eBay’s purchase of Paypal) is almost anticlimactic, as pretty much anyone worth writing about left the company soon after that point. The paperback edition has author’s epilogue on Google’s recent entry into online payments world (not person-to-person payments, but merchant payments only), where Jackson is fairly optimistic about Google’s potential in the market, since Checkout can be a loss leader for Google, as long as merchants keep boosting its primary revenue line, Internet advertising.

Dec 06

Review of How to Drive Your Competition Crazy by Guy Kawasaki

How to drive your competition crazyHow to Drive Your Competition Crazy: Creating Disruption for Fun and Profit by Guy Kawasaki is a 1996 book that’s nevertheless still inspiring and interesting to read. It tells the stories of Davids fighting Goliaths in all sorts of markets with better and more inventive marketing. Ask an average geek about his marketing plan for any product out there, and most of us could probably come up with a strategy to lower prices below competitor’s. However, even though we’re wallet driven, note how major market leaders out there don’t win by price.

Coke and Pepsi cost more than a store-branded soda, and nevertheless command humongous market shares compared to Safeway Select or Albertson’s brand. Linux is substantially cheaper than Windows, but nevertheless Windows commands quite a market. Most of the time, as marketers find out, people actually feel good about paying extra for the product that delivers extra advantages and differs from the competition. As much as we all like to save money, we all like to feel good spending money in a smart way, i.e. paying more for sophistication and convenience.

Hence Guy Kawasaki tells the store of his career as Apple evangelist, when Mac market share was even below what it is right now. He tells the story of a Mom-and-Pop hardware store that everybody thought would shut down as soon as Home Depot opened next door. A story of Sears making their catalog smaller than Montgomery Ward’s, therefore ensuring it would be placed on top in any household. A story of a pizza chain offering a 2-for-1 special to anybody who brings a Yellow Pages ad of their competitor (and therefore eliminates the opportunity to know the competitor’s phone number next time they need a tasty Italian dish).

The book is good at pointing that competing on price is usually devastating to the business who starts the price war, and that every employee of an organization is in essence a marketer. It provides a fresh (even though it’s a 10-year-old book) view into what effective marketing is, and provides great food for thought regarding good and bad marketing practices we see today. The book is like a buck on Amazon (or if you know me, ping me and I can give you the book), and I read it over a few bus trips to Palo Alto and back.

Dec 06

Review: Condensed Knowledge

Condensed knowledgeJust yesterday in the meeting someone was wondering what “revved up like a deuce” meant in Blinded by the light. And I knew it referred to a thirties car, but forgot which one (it’s a 1932 Ford). Nevertheless the book Condensed Knowledge has already paid off as far as bringing up some of the most interesting trivia out there. As you can see from the table of contents, the authors (and there are quite a few of them) condensed the human knowledge of chemistry, psychology, history, religion, math, literature, music and other areas into digestible collections of paragraph-long facts, united by some theme such as “4 nations that get no respect”, “Most influential women in world religions”, “Literary works written under influence” and other equally catchy chapter subtitles.

The book contains a vast collection of interesting facts from all branches of human knowledge, debunks some popular myths, and generally provides for hours of good reading where you literally cannot put the book away. Depending on how deep you went into specific areas while in high school or college, it might even introduce some new stuff to you- such as why some African countries have such liquid borders and are in constant warfare. For a $10 price tag you get endless stream of interesting facts to bring into conversations and possibility to surprise friends and enemies with vast array of trivia knowledge.