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Freakonomics Blog

The Art of Online Recommendations

Wired profiles Hunch, a company trying to master the art of online recommendations. Hunch participants respond to “Teach Hunch About You” questions, and their answers are fed into a master algorithm, which has already revealed some interesting correlations.



The Canseco Effect?

The economists Eric Gould and Todd Kaplan have used data to evaluate Jose Canseco’s claim that he taught many teammates to use steroids and growth hormones.



Would You Like a Tchotchke With Your Internet?

A souvenir store on Unter den Linden in Berlin offers 15 minutes of “free” internet usage. To log in, you go to the counter, get an entry code, and are free to use a PC. Moreover, you can use the code to get 10% off the purchase price of any souvenir in the shop. But unlike some “free” deals that come with tie-in purchases, this is a voluntary tie-in.



When Crowds Panic

The recent deaths at the annual Love Parade music festival in Duisburg, Germany, can be counted among the most perplexing form of tragedy: one that unfolds entirely as a result of the normal psychology of healthy human beings. When crowds reach a critical density, they automatically become vulnerable to a contagion of blind fear that overwhelms any attempt at rational behavior. The paradox of terror is that the subconscious fear response, which evolved over millions of years to keep us safe, can itself pose a terrible danger in the 21st century.



The Story on Shopping

If you want to know how people around the country are shopping, just ask the retailers and banks and credit card companies who collect reams of data on consumer buying patterns.



Criminals Gone Wild

East St. Louis, faced with budget shortfalls, will lay off 30% of its police force (19 of its 62 officers) after negotiations with the union failed. City residents and police officers worry the move will lead to a significant increase in crime.



Reducing Hospital Bouncebacks

Zachary Meisel and Jesse Pines examine the issue of hospital “bouncebacks” — patients who return to the hospital shortly after discharge: “[B]ouncebacks are massively expensive-a recent study of Medicare patients found that one in five admissions results in a bounceback within 30 days of discharge, costing the federal government an estimated $17.4 billion per year.”




Know Your Scarcity

Fred Brooks, the computer scientist who 35 years ago wrote the still-relevant The Mythical-Man Month, has written a new book, The Design of Design, and Kevin Kelly interviews him in Wired.



Charitable Giving in a Recession

A new report, based on the Center on Wealth and Philanthropy’s Individual Giving Model (IGM), estimates that individual charitable giving was down 4.9% percent in 2009.



Memories of Madrid

A recent trip to Madrid included a lecture at the Universidad Europea de Madrid (which features, among other things, a dentistry school, at right). The best part was a short film that had been made before my arrival: a spoof in which an economics class at the university is taught freakonomics instead of economics (sorry, no translation available).





A Clue to Referee Bias?

The BPS Research Digest reports that “[a] simple perceptual bias could influence football referees’ judgments about whether a foul occurred or not.”



Teen Sex, Binge Drinking, and Obesity

In “Binge Drinking & Sex in High School” (abstract here; PDF here), Jeffrey S. DeSimone argues that “binge drinking significantly increases participation in sex, promiscuity, and the failure to use birth control, albeit by amounts considerably smaller than implied by merely conditioning on exogenous factors.”



Too Many Constraints

One of my German colleagues has access to $30,000 for Gleichstellung-a German version of an EU-wide initiative to achieve equality between healthy white males and various “disadvantaged” groups, including women. Cleverly, the German government does not want people to substitute these moneys for other funds; as with any subsidy, there is a concern that people will spend it on activities they would have undertaken anyway.




The United Mistakes of America

Kathryn Schulz, the author of Being Wrong, has been guest-blogging for us about being wrong – and admitting our mistakes. Her latest post examines the historical culture of error in the United States.



What if TV Networks Aired All Their Pilots?

In Hollywood, a lot of people make a good living by making TV pilots that never end up on the air. (There’s also a strong market for writing film scripts that are never turned into films.) According to Variety, roughly one-third of pilots end up on the air; here’s a primer about the process. With each pilot costing hundreds of thousands, if not millions, of dollars, that’s a lot of money spent so that a handful of TV executives can give something a thumbs-down and consign it to the trash.