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Freakonomics Experiments Lottery Winners

If you have a tough decision to make, wander on over to FreakonomicsExperiments.com. So far we’ve helped more than 20,000 people make decisions, and the preliminary results look great.

As an incentive to get people who tossed coins at FreakonomicsExperiments to complete follow-up surveys, we promised to give away prizes via lottery. As evidence we kept our word, the complete list of winners is here. Read More »



Thanks to Freakonomics Blog Readers (Sort of), the Gneezy and List Book Finally Has a Title

A while back we held a contest for the new popular economics book written by Uri Gneezy and John List. The authors and their publishers picked some of their favorite title suggestions and then we ran a beauty contest to determine which title was most popular among blog readers. The deal was that the person who proposed the winning title would get $1,000. Another $1,000 was to be split between randomly selected beauty contest participants.

Before I tell you which title won, let me tell you about the naming of Freakonomics. We had such an impossibly hard time coming up with a good name until my sister Linda came up with “Freakonomics.” To make a long story short, the publishers hated that name for a long time, but finally gave in. The rest is history. Of course we were all just guessing — it would have been nice to have data, the way Uri and John did.

So what do the data say? The winner of the beauty contest, with 33 percent of the votes, was The Carrot that Moved A Mountain: How the Right Incentives Shape the Economics of Everyday Life. Congratulations to Ivy Tantuco who proposed that title and collected the $1,000 prize.(Congratulations also to Jenna Dargie and Melinda Reiss, who were the randomly chosen beauty contest winners and pocketed $500 each.) Read More »



Emily Oster Answers Your Pregnancy Questions

Last week, we solicited your questions for economist Emily Oster, a Freakonomics favorite and author of the new book Expecting Better: Why the Conventional Pregnancy Wisdom Is Wrong-and What You Really Need to Know.  Oster’s answers are below and address everything from how fertility declines with age to whether pregnant women can still safely indulge in caffeine, fish, and transatlantic travel.  A big thanks to Emily — and to all of you for your excellent questions. Read More »



What You Should and Shouldn’t Do When You’re Pregnant: Submit Your Questions for Emily Oster

If you’ve ever been pregnant, or been close to someone who is pregnant, you know how many prohibitions there are.  You can’t smoke or drink.  Shellfish are to be avoided.  In my house, conveniently (for the pregnant woman), scooping the cat litter was absolutely out of the question.  Of course, there are also a large number of things you have to do when you are pregnant or are thinking of getting pregnant, like take folic acid.

Is there any evidence to support all these pregnancy rules?  My good friend and colleague Emily Oster (whose research has been featured in SuperFreakonomics and many times on the blog), has just written the definitive book on the subject, entitled Expecting Better: Why the Conventional Pregnancy Wisdom Is Wrong-and What You Really Need to Know.  She has generously agreed to answer blog reader questions, so fire away in the comments section below and, as always, we’ll post her answers in good time!

Here’s the Table of Contents to get you started: Read More »



Another $1,000 at Stake in the Gneezy-List Book Title Experiment

A couple weeks ago, Uri Gneezy and John List asked our blog readers to come up with titles for their new book.  And our readers did not disappoint!  There were over 400 suggestions, many of them brilliant.

The authors and their editors have now narrowed it down to five choices, and they once again are asking for your help in deciding on the final title.  There is no better way to solicit that input than — you guessed it — a field experiment.  To get you interested, they are putting up another $1,000 in prizes to participants.

The rules are simple: You go here and answer  two simple questions.

First, you will be asked to choose which of the five titles you think will be the most popular among all the respondents.  They don’t want to know your favorite title, they want to know the title you think other people will like best. Read More »



Looking for a Long Shot: My Belmont Predictions

I whiffed on the Kentucky Derby and caught lightning in a bottle at the Preakness.

Let’s see if I can do it again.

All eyes are on Orb and Oxbow, the winners of the first two legs of the Triple Crown. Those two horses are likely to be heavy betting favorites in the Belmont. And according to my model, they look okay, but not attractive at the odds they will go off at.

Instead, my numbers suggest a trio of long shots are the place to put your money: Palace Malice, Overanalyze, and Golden Soul. Each of those horses should pay about 15-1 if they were to pull off an upset victory. Read More »



Here’s Your Chance to Name a (Soon-to-Be) Best-Selling Book and Win $1,000

 My close friend, colleague, and frequent co-author John List has written a popular (non-academic) book with another economist, Uri Gneezy.  John and Uri are pioneers in the area of “field experiments” which bring the power of randomized experiments into real-world settings.   In my opinion, field experiments are the future of empirical economics.  We’ve written at length in our books and on our blog about the amazing work these two have been doing. I’ve had the chance to read John and Uri’s book, and I loved it.

The thing they can’t figure out, however, is what to call the book!  If only my sister Linda – the greatest namer of things the world has ever known — were still around, she would figure out a great title for sure.  In her absence, they’ve asked if I could mobilize the collective genius of you, the Freakonomics blog readers.

Okay, so here is the deal.  Below, I’ve provided some information on the book and links to some materials that might prove useful to you in coming up with a name.  You have two days to generate great titles for the book, which you can submit as comments on this blog post. Read More »



Redemption at the Preakness

I made a mess out of this year’s Kentucky Derby.  The worst part is that a bunch of friends placed bets using my picks, collectively losing a large stack of money.  

After the Kentucky Derby, I blogged about the misery, noting what a strange race the Derby was:

The race is 1.25 miles long and there were 19 horses in the race. Of the eight horses who were in the front of the pack after one-fourth of a mile, seven ended up finishing in back: 12th, 14th, 15th, 16th, 17th, 18th, 19th. Only one horse that trailed early also finished poorly, and that horse started terribly and was way behind the field from the beginning. In contrast, the horses who ended up doing well were in 16th, 15th, 17th, 12th, and 18th place early on in the race. Basically, there was a nearly perfect negative correlation between the order of the horses early in the race and the order of the horses at the end of the race!

Read More »