From the refusal of the U.S. Congress to approve fast-track trade authority and certain foreign aid packages to the obstacles placed by Western European parliaments in the path of economic integration, legislatures often interfere with national leaders' efforts to reach and implement predictable international agreements. This seems to give an advantage to dictators, who can bluff with confidence and make decisions without consultation, and many assume that even democratic governments would do better to minimize political dissent and speak foreign policy from a single mouth. In this...

This innovative study shows that multilateral sanctions are coercive in their pressure on their target and in their origin: the sanctions themselves frequently result from coercive policies, with one state attempting to coerce others through persuasion, threats, and promises. To analyze this process, Lisa Martin uses a novel methodology combining game-theoretic models, statistical analysis, and case studies. She emphasizes that credible commitments gain international cooperation, and concludes that the involvement of international institutions and the willingness of the main "sender" to...