In our analysis, we tracked the shareholder returns each CEO generated, starting from day one on the job, along with the change in each company’s market capitalization. We adjusted the returns for each industry and country, to offset any increase that was attributable merely to being in a hot market. Then, to account for the many aspects of leadership beyond financial success, we incorporated a measure of environmental, social, and governance performance. For this we relied on the ratings of the investment research firm Sustainalytics.