Booz & Company’s annual study of chief executive arrivals and departures, now with 10 years’ worth of data covering 3,719 succession events at the world’s largest companies, shows that the traits of new CEO appointments are converging across regions and industries.

In addition to analyzing turnover data, this year the study's authors also conducted more than a dozen interviews with CEOs in the United States, Europe, South America, and Japan, and their remarks reaffirm the study’s conclusions: The tenure of a CEO is becoming shorter and more intense, the margin for error or underperformance is narrow, and the role of CEO increasingly excludes the job of also being chairman.