Reply to ECNL moving to school year part 2

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[quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous]Real data on RAE. https://www.usyouthsoccer.org/wp-content/uploads/sites/160/2023/09/Relative-Age-Effect-in-Elite-Youth-Soccer.pdf   Yes for boys, Equivocal for girls
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This data is well more than a decade old.[/quote]

Okay here is a more recent study.   https://bmcsportsscimedrehabil.biomedcentral.com/articles/10.1186/s13102-025-01312-1  Interesting that Premier league shows no effect, perhaps because the mix of English players coming up with a September cutoff mixed with internationals with BY.[/quote]

Interestingly enough if you dig deep enough in that study, you find another MORE ON POINT where one realizes RAE is very significant:

https://www.termedia.pl/Relative-age-effect-across-the-talent-identification-process-r-nof-youth-female-soccer-players-in-the-United-States-Influence-r-nof-birth-year-position-biological-maturation-and-skill-level,78,52572,1,1.html

What's really fun is the authors use BY to analyze these groups and FIND later year balance without apparently realizing those later years BEGAN in a SY system. They call it reverse RAE. It's bonkers, really.

CONCLUSIONS
"To conclude, our data showed an RAE of youth female soccer players within the US. At Club and TID Center, this RAE was most prominent in goalkeepers, center backs, midfielders, and center forwards, and for U13–U18 ages, but these did not typically transfer to YNT. Consistent RAEs were observed in early- and on-time-maturers across all levels. A reversal of ‘typical’ RAE was evident at YNT, with late-maturers more likely to be from Q4 and a higher percentage than elsewhere in the TID process. When interpreting all the data, some limitations should be acknowledged. Due to the large volume of players and the club soccer environment, we used estimated measurements of maturation. Future research may examine comparisons between scouts’ perceptions and actual biological maturation status. Moreover, we only provided a ‘snapshot’ of RAE in youth female soccer in the US. Therefore longitudinal, cross-sectional analysis examining youth-to-senior transitions would be beneficial to identify if there were different patterns of RAE amongst players retained across the stages in comparison to those newly selected [22]."

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