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Your point about metrics is well taken, but PER has even more fundamental problems. First is that players are rewarded (with higher PERs) the more shots they take, not matter how inefficient they are at scoring. Second, there is no attempt to link PER's weights with anything other than Hollinger's beliefs about what makes a player good. Berri's WP48 -- which has its own problems -- at least attempts to link stats with winning. Anyway, great post. Some good thinking here. Just wanted to point out that PER is far from a "great stat".
2 years, 12 months ago on Random Musings on Rondo, PER, And The Heat