Are political leaders with a business background any different?

The argument holds that leaders with business experience make smaller contributions to collective defense because they are egoistic and more comfortable relying on a powerful ally for their defense. An analysis of defense expenditures in 17 non‐U.S. members of the North Atlantic Treaty Organization from 1952 to 2014 provides evidence consistent with the theory. The findings suggest that leaders with business experience are more likely than other heads of government to act as self‐interested utility maximizers.

Here is the full study, by Matthew Fuhrmann.  Via the excellent Kevin Lewis.