I've been quite busy restructuring my model to make the addition of new factors easier. The new framework is close to finanlization and my first new factor will be the player's age. This analysis is far from ready, but the first result is just too beautiful to keep it unpublished.
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So we have a perfect age for football players between and including 25 and 30. Therefore and thereafter players' performance, on average, drops significantly. The steepness is greater for young players. The drop for old players is slower. Interestingly, there seems not to be one ideal age. All years between 25 and 30 are about equal in performance.
This picture is not finalized as currently all football players are treated equally. Pundits would agree, however, that goalkeepers, and maybe defender, will lose less performance with age than other players. So separating by position is likely to give further inside. I'd also expect the drop in performance for midfielders and strikers to be steeper than in the chart. Still the first try was just too strikingly in line with expectation. I just had to give you a sneak preview.
This picture is not finalized as currently all football players are treated equally. Pundits would agree, however, that goalkeepers, and maybe defender, will lose less performance with age than other players. So separating by position is likely to give further inside. I'd also expect the drop in performance for midfielders and strikers to be steeper than in the chart. Still the first try was just too strikingly in line with expectation. I just had to give you a sneak preview.