Looking for someone ambitious enough to do this. I will find it curious who poses the best ratings on our team since we are so concerned with minutes as of late. Everything is explained below and if someone makes a excel sheet this should be easy to do however I have no type of programs on my mac yet to do so.
The Player Efficiency Rating (PER) is a per-minute rating developed by John Hollinger, author of Pro Basketball Forecast. In Mr. Hollinger's words, "The PER sums up all a player's positive accomplishments, subtracts the negative accomplishments, and returns a per-minute rating of a player's performance." It appears from his books that Mr. Hollinger's database only goes back to the 1988-89 season. I decided to expand on Mr. Hollinger's work and calculate PER for all players since minutes played were first recorded (1952).
All calculations begin with what I am calling unadjusted PER (uPER). The formula is:
uPER = (1/MP)*
[ 3P
+ (2/3)*AST
+ (2 - factor*(tmAST/tmFG))*FG
+ (FT*0.5*(1 + (1 - (tmAST/tmFG)) + (2/3)*(tmAST/tmFG)))
- VOP*TO
- VOP*DRBP*(FGA - FG)
- VOP*0.44*(0.44 + (0.56*DRBP))*(FTA - FT)
+ VOP*(1 - DRBP)*(TRB - ORB)
+ VOP*DRBP*ORB
+ VOP*STL
+ VOP*DRBP*BLK
- PF*((lgFT/lgPF) - 0.44*(lgFTA/lgPF)*VOP) ]
Most of the terms in the formula above should be clear, but let me define the less obvious ones:
factor = (2/3) - (0.5*(lgAST / lgFG)) / (2*(lgFG / lgFT))
VOP = lgPTS / (lgFGA - lgORB + lgTO + 0.44*lgFTA)
DRBP = (lgTRB - lgORB) / lgTRB
I am not going to go into details about what each component of the PER is measuring; that's why Mr. Hollinger writes and sells books.
Problems arise for seasons prior to 1979-8