PER: Player Efficiency Rating explained

Updated: April 26, 2007, 3:29 PM ET
By John Hollinger | ESPN Insider
The Player Efficiency Rating (PER) is a rating of a player's per-minute productivity.

To generate it, I created formulas -- which I've outlined in tortuous detail in "Pro Basketball Forecast" -- that return a value for each of a player's accomplishments. That includes positive accomplishments, such as field goals, free throws, 3-pointers, assists, rebounds, blocks and steals, and negative ones, such as missed shots, turnovers and personal fouls.