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Earl Boykins

#11 / Guard / Charlotte Bobcats

5-5

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Jun 02, 1976

Eastern Michigan

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Orlando Magic News for January 31st - J.J., Nicknames, and Hedownage

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John Hollinger's Orlando Magic PER Predictions

John Hollinger, the statistical whiz who derived Player Efficiency Rating (PER), has released his projected 2007/2008 PER statistics for every player who played at least 500 minutes last season. PER is, as he explains it to Henry Abbott of TrueHoop:

Anyway, PER is a per-minute rating of a player's statistical productivity. It's great for measuring a player's "tangibles"; the one area it struggles is with defense because so much of that remains a black box for the analytical community.

I use it so much because it makes it very easy to make comparisons between players who play differing minutes, or in different systems or what-not -- comparisons which, using conventional stats, are almost impossible.

Here is how PER is derived:

I base the projections on a tool called similarity scores.

For each player, I use as a comparison the players from the past 20 years who are the most similar, based on age, height and stats over the past three seasons. Some players will have more comparables than others, depending on how unusual they are -- guys with freak heights (Yao Ming, Earl Boykins), freak ages (Dikembe Mutombo) or freak stats (Andrei Kirilenko) will have relatively few, while a more generic player like Al Harrington or Devin Brown could have over a hundred.

From that point, I see what their most similar players did a year later, and project those changes onto the stats of the player being studied. So, for example, the reason that Yao Ming's PER is projected to rise sharply this year is because the most similar players also saw their PERs increase sharply at the same age; similarly, Andre Miller is expected to tank because a number of similar players hit the wall at his age.

PER is normalized each year to 15; that is, if you have a PER of 15, you're an average player. After the jump, I've posted a table showing how Magic players fared last year, as well as Hollinger's projections for them this year, and their difference. Alternatively, you can click here to view the predictions directly on ESPN.com. While the raw numbers are free, the player profiles are not.

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