Why do governments choose multilateralism? We examine a principal-agent model in which states trade some control over the policy for greater burden sharing. The theory generates observable hypotheses regarding the reasons for and the patterns of support and opposition to multilateralism. To...

Estimating the mechanisms that connect explanatory variables with the explained variable, also known as "mediation analysis," is central to a variety of social-science fields, especially psychology, and increasingly to fields like epidemiology. Recent work on the statistical methodology behind...

The vast majority of scholarship on foreign aid looks at either the effectiveness of foreign aid or why particular countries receive aid from particular donors. This paper takes a different approach: what are the domestic sources of support for foreign aid? Specifically, how does the donor's...

International relations has often been treated as a separate discipline distinct from the other major fields in political science, namely American and comparative politics. A main reason for this distinction has been the claim that politics in the international system is radically different from...