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How to rate the sportsmen and women of the day against the stars of yesteryear.

There’s no easy way to make meaningful comparisons when sports change so dramatically over the years. Even in endeavours like baseball where player stats have been meticulously kept for almost a hundred years, comparisons across the decades can be odious. Is it really fair to compare players from the 1920s against those of the last 20 years when so many external factors have changed such as the use of new equipment, better training methods and, of course, performance enhancing drugs?

In 1914, the National League Most Valuable Player was Johnny Evers with a batting average of 0.279, 1 Home Run and 40 Runs Batted In. That was impressive then but these stats would embarrass even a second rate player in today’s game.

But what if there were a way to remove the systematic differences to reveal intrinsic talent? Today, Alexander Petersen at Boston University and a few pals explain just such a method that “detrends” the data leaving an objective measure of a player’s raw ability.

{ The Physics arXiv Blog | Continue reading }





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