Family Planning: Football Style. The Relative Age Effect in Football

@article{Barnsley1992FamilyPF,
  title={Family Planning: Football Style. The Relative Age Effect in Football},
  author={Roger H. Barnsley and Alvin H. Thompson and Philipe Legault},
  journal={International Review for the Sociology of Sport},
  year={1992},
  volume={27},
  pages={77 - 87}
}
Recent studies indicate that month of birth is related to achievement in a number of sports. Birth dates were collected for all players on teams competing in the 1990 World Cup and the 1989 Under-17s and Under-20s World Tournaments in Football. Results indicated that those born early in the "activity year" (August 1 through July 31 for football) were over- represented, while those born later were under-represented. The effect was particularly strong in the Under-17s and Under-20s tournaments… 

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