New Metric: Efficiency-Based Rankings

I've created a new metric based on the Offensive Ratings listed in the Box Scores ("ORtg" in "Four Factors" section) at Basketball Reference. Similar to the Power Rankings, this iteratively adjusts based on the strength of the opponent in terms of their offensive rating as well as their ability to keep an opponent's rating low (i.e. defensive rating). I believe this recursive process is novel.