Statisticians: Plus Minus Ratings
11/13/07
Statistician's Digest: Plus Minus Ratings
"......With regard to this item: I like the plus-minus statistic - how does the team perform with Player A on the court, compared to how they perform without him - but as some of the other articles you point to probably say, this measure can be problematic. A major issue is efficiency: there can be a lot of "noise" --- stochastic variability --- in the stat. Fortunately (from the point of view of a plus-minus statistic) Basketball has a lot of scoring and a long season, so stochastic variability is much less of a problem than in, say, baseball or hockey. But still, you really want/need to adjust for quality of the other players on the court (on both teams). It's also desirable to adjust for the game situation: in a blowout victory or loss, little or nothing is learned from performance in "garbage time," for example. Of course, some of the same problems come up with any analysis, whether plus-minus or not. No matter how you slice it, you're looking at a non-trivial bit of analysis. That said, I like the plus-minus approach. ......."
A selected excerpt from the discussions at the eBA116 - eBA System Clinic about this topic "Plus Minus Ratings".
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tags: basketball ~ statistician's digest ~ basketball analysis ~ statistics
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