Earlier, this week we took a look at Aggressiveness Index numbers for 2020. Today, we're going to look at historical Aggressiveness Index going all the way back to 1983.
Aggressiveness Index numbers center around 1.0 and generally describe how much more (or less) likely each coach is to go for it on fourth down compared to his peers; for example, a coach with 1.20 AI is roughly 20 percent more likely to go for it than an average coach historically would in equivalent situations. There are other methodologies now for measuring fourth-down aggressiveness, mostly based on win probability analysis: for example, the EdjSports head coach rankings or results spit out by Ben Baldwin's fourth-down simulator.