Over the past fifty years, barriers to international trade have decreased substantially. A key source of this decline in protectionism has been the proliferation of agreements among countries to liberalize commerce. In this article, we analyze the domestic political conditions under which states...

We examine how domestic political factors influence the type of regional integration arrangement (RIA) that states enter. States can pursue at least five types of RIA, in order of their depth of policy integration: preferential trade agreements, free trade areas, customs unions, common markets...