13 Pages Posted: 8 Mar 2018 Last revised: 8 Oct 2018

Date Written: March 1, 2018

Abstract

We build a simple, but powerful and intuitive, model for when a hockey coach should pull the goalie when trailing. When the model reports that the coaches aren’t doing it nearly early enough, we then ask why, and take away some key lessons for portfolio and risk management, and business in general.