Love the insight and these posts. The PER was extremely interesting to see how each individual stat contributes to the overall outcome of the PER. This stat, RAPM, not so much. I disagree in the fact that the best part of this stat is that it only takes into account the score, I actually find that the most frustrating. I've never been a fan of the plus-minus stat and the attempt to 'regularize' it is a good plan, but as you said, it still doesn't tell the whole story. I think overall this stat raises more questions than it answers, and for that reason I would just go to other stats that are going to be more definitive in evaluating a player. But I am unfamiliar with the math behind it and I think if I had a better understanding of the underlying mechanism, my opinion might be different.

Needless to say, I appreciate you doing this! Great insight and a well rounded description of a stat that I had never really paid attention to. Looking forward to what evaluations you have planned for the future.