Limited data on regional and preferential trade agreements prevent social scientists from testing some of the international cooperation literature’s most important claims. Expert surveys—a technique that is widely used in the field of comparative politics but thus far underutilized in...

Under what conditions do states maintain trade cooperation? We explore this question using models of imperfect monitoring. Most formal models of international cooperation rely on signaling games, in which actors' actions are perfectly observable. Here we examine conditions for cooperation when...