Sunday, September 06, 2009

Research Idea

I feel like players who move from the AL to NL midseason enjoy an irregular level of success (this feeling biased by Holliday/Lugo/Smoltz/Penny from this year). My idea is that playing against tougher competition for half a season makes you better through practice (if true this would have large implications, like players could get better if they practiced harder). I don't have any idea how to measure this though (as in what would the control be here?), how to measure specifically this (as in how to isolate the league change effect), or how to normalize for sample bias since you'd think players that other teams are interested in would be somewhat undervalued (ie unlucky) so far that season.