Trade, societal interests, and political parties

Abstract

We argue that international trade affects party systems but that this impact is conditioned on the types of societal interests trade brings about. When factor mobility is high, trade promotes class-based grievances that are unlikely to affect the structure of the party system. However, when factor mobility is low, trade will increase the diversity of group interests and policy preferences, thereby pressuring structural change in the party system. A consequence is an increase in the effective number of political parties. The empirical analysis supports these expectations. This paper contributes to our understanding of the political impact of economic liberalization on representative democracy.