In basketball statistics, Offensive Efficiency Rating (OER) is the average number of points scored by a basketball player per shot taken.
This includes missed field goals as well as free throws.
The statistic stems from the previously created Player Efficiency Rating (PER).
The per-minute rating was created by John Hollinger.
Hollinger states, "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.