Plus-Minus, a.k.a. +/-, simply keeps track of the net changes in the score when a given player is either on or off the court. The NBA has been publishing plus-minus values in official box scores since the 2007-2008 season. A variety of combinations including the best two-player, three-player unit, and even five-player combinations for each game can be provided with this tool.
Since the invention of basic plus-minus, the plus-minus technique has been developed in order to get more accurate results.
There have been a few statheads who have developed different types of plus-minus metrics. Here’s a collection:
- Defensive Plus-Minus (DPM)
- Net Plus-Minus (NPM)
- Adjusted Plus-Minus (APM)
- Statistical Plus-Minus (SPM)
- Regularized Adjusted Plus-Minus (RAPM)
- Real Plus-Minus (RPM)
- Box Plus-Minus (BPM)
- Player Tracking Plus-Minus (PT-PM)
- Estimated Plus-Minus (EPM)
- Player Impact Plus-Minus (PIPM)
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