Relative age effect in elite sports: Methodological bias or real discrimination?

  title={Relative age effect in elite sports: Methodological bias or real discrimination?},
  author={Nicolas Delorme and Julie Boich{\'e} and Michel Raspaud},
  journal={European Journal of Sport Science},
  pages={91 - 96}
Abstract Sport science researchers refer to a relative age effect when they observe a biased distribution of elite athletes' birth dates, with an over-representation of those born at the beginning of the competitive year and an under-representation of those born at the end. Based on the complete sample of French male licensed soccer players (n=1,831,524), we suggest that there could be an important bias in the statistical test of this effect. This bias could in turn lead to the false conclusion… 

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