Electoral institutions,cleavage structures,and the number of parties

  title={Electoral institutions,cleavage structures,and the number of parties},
  author={Oct{\'a}vio Amorim Neto},
  journal={American Journal of Political Science},
Theory: A classic question in political science concerns what determines the number of parties that compete in a given polity. Broadly speaking, there are two approaches to answering this question, one that emphasizes the role of electoral laws in structuring coalitional incentives, and another that emphasizes the importance of preexisting social cleavages. In this paper, we view the number of parties as a product of the interaction between these two forces, following Powell (1982) and… Expand