Just in time for the NBA Finals, I’ve taken a look at the RSPM formula and made some changes that I think will improve it a lot.
My frustration with the old numbers was that they didn’t add up at the team level. For example, the Indiana Pacers were a +4 team in the regular season, but the RSPM numbers were indicative of a league-average team.
I’ve changed that by introducing raw plus-minus as an element in the formula. By doing so, I’ve constructed the RSPM formula so that the individual player ratings do add up to a team’s level of performance.
Tomorrow, I’ll have an NBA Finals preview, complete with RSPM ratings and my prediction for how the series will go. See you then!