May 7th, 2006 - Open Knowledge — LiveJournal
May. 7th, 2006
02:16 pm - The Birth-Month Soccer Anomaly
Via Marginal Revolution
By STEPHEN J. DUBNER and STEVEN D. LEVITT
The Birth-Month Soccer Anomaly
If you were to examine the birth certificates of every soccer player in next month's World Cup tournament, you would most likely find a noteworthy quirk: elite soccer players are more likely to have been born in the earlier months of the year than in the later months. If you then examined the European national youth teams that feed the World Cup and professional ranks, you would find this quirk to be even more pronounced. On recent English teams, for instance, half of the elite teenage soccer players were born in January, February or March, with the other half spread out over the remaining 9 months. In Germany, 52 elite youth players were born in the first three months of the year, with just 4 players born in the last three.
What might account for this anomaly? Here are a few guesses: a) certain astrological signs confer superior soccer skills; b) winter-born babies tend to have higher oxygen capacity, which increases soccer stamina; c) soccer-mad parents are more likely to conceive children in springtime, at the annual peak of soccer mania; d) none of the above.
Anders Ericsson, a 58-year-old psychology professor at Florida State University, says he believes strongly in "none of the above." He is the ringleader of what might be called the Expert Performance Movement, a loose coalition of scholars trying to answer an important and seemingly primordial question: When someone is very good at a given thing, what is it that actually makes him good?
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