PER vs APER

[stacey_is_king]

There's a statistic on Hoopdata called APER. The summary of it on their site describes it as following:

APER: Alternate Player Efficiency Rating: PER adjusted for actual Assisted and Unassisted Field Goals, as opposed to using estimates. Also includes Charges.

How credible is it?

[Doctor MJ]

Both changes are undeniable improvements to the methods. If that data was available historically, Hollinger would have used them in PER - although since my understanding is that Hollinger used a healthy dose of gut feel in his weighting of components so it's possible once he had the equivalent of APER he might have made further tweaks..

To explain a bit further about the first part: PER makes a rough estimate for the value of scoring vs the value of assists based on how often assisting occurs league-wide. There's zero reason not to get more specific except that Hollinger wanted something that worked historically.