EvanZ wrote:jman3134 wrote:http://basketballvalue.com/index.php Is this website so last year with the xRAPM out now? (and I say that in gest b/c they only have last year's numbers) Can someone (Evan) explain the difference in APM vs. xRAPM?
To the first question, the guy who ran basketball-value (Aaron Barzilai) now is the head stats guy for Philly. He probably won't be updating the site going forward (I spoke to him over the phone, and while he didn't rule it out, I would say he sounded very doubtful about it).
To your second question, it's really fairly complicated. In a nutshell, RAPM is the regularized form of APM. RAPM is a better predictor than APM. xRAPM tries to use box score stats to improve the predictability of RAPM. (Apparently) it is a better predictor than pure RAPM.
Do you know much about what's involved in that? Cus +/- stats of any kind are like the opposite of box score stats, it seems like adding in things like point, rebounds, assists (things where the exact value of each one isn't always...exact) doesn't seem to fit into the PM model.