“Sports franchises often value prior head coaching experience as they evaluate head coaching candidates. This paper empirically tests whether prior head coaching experience affects team performance in the National Football League.”

“Accounting for individual coach effects and other relevant factors, I find that team performance is significantly worse beyond a given coach’s initial head coaching spell.”

“While coaches with the lowest levels of success in their initial head coaching spell have the most pronounced negative experience effects, significant negative effects are estimated for coaches at all levels of initial success.”

M.Roach
Does Prior NFL Head Coaching Experience Improve Team Performance?
Journal of Sport Management — Volume 30 #3 — March 201