Alliances and the High Politics of International Trade

What is the role of trade policy in military alliances? We analyze and test a game-theoretic model of economic and security cooperation in which allies hold different interests across the security and commercial aspects of the relationship. In equilibrium, allies with little market power who are valuable politically to larger states engage in sociallysuboptimal protectionism, as their allies’ threats of retaliation are incredible. Stable cooperation emerges in the form of unretaliated protection rather than mutually low trade barriers. We test the model’s implications against a dyadic data set of antidumping petitions from 1980 to 2013 and find that larger allies are more likely to tolerate protectionism by smaller allies by denying domestic petitions to retaliate against dumping measures by the latter.