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The Logic of Contamination: District-Level Party Systems

  • Federico Ferrara
  • Erik S. Herron
  • Misa Nishikawa

Abstract

Even before mixed systems rose to the status they currently enjoy—the most fashionable set of electoral institutions—Maurice Duverger (1985, 72) discussed how these electoral rules are characterized by a spill-over effect: “Politically, this combination of the English system and PR exerts a pressure toward a two-party system as a result of the first vote, which influences citizens in how they cast their second vote.” Duverger envisioned a kind of interactive effect whereby the two-party competition that is typical of majoritarian races would spill over to the proportional tier. In both components of the election, the party system should approximate “bipolar” arrangements, in spite of the tendency of proportional representation to encourage the proliferation of parties.

Keywords

Vote Share Party System Liberal Democratic Party Strategic Vote Electoral Rule 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Federico Ferrara, Erik S. Herron, and Misa Nishikawa 2005

Authors and Affiliations

  • Federico Ferrara
  • Erik S. Herron
  • Misa Nishikawa

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