It's parties that choose electoral systems (or Duverger's Law upside down)
This article presents, discusses and tests the hypothesis that it is the number of parties what can explain the choice of electoral systems, rather than the other way round. Already existing political parties tend to choose electoral systems that, rather than generate new party systems by themselves, will crystallize, consolidate or reinforce previously existing party configurations. A general model develops the argument and presents the concept of 'behavioral-institutional equilibrium' to account for the relation between electoral systems and party systems. The most comprehensive dataset and test of these notions to date, encompassing 219 elections in 87 countries since the 19th century, are presented. The analysis gives strong support to the hypotheses that political party configurations dominated by a few parties tend to establish majority rule electoral systems, while multiparty systems already existed before the introduction of proportional representation. It also offers the new theoretical proposition that strategic party choice of electoral systems leads to a general trend toward proportional representation over time.
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- Daniel Diermeier & Keith Krehbiel, 2003. "Institutionalism as a Methodology," Journal of Theoretical Politics, SAGE Publishing, vol. 15(2), pages 123-144, April.
- Rein Taagepera, 2003. "Arend Lijphart's Dimensions of Democracy: Logical Connections and Institutional Design," Political Studies, Political Studies Association, vol. 51(1), pages 1-19, 03.
- Carles Boix, 1999. "Setting the rules of the game: The choice of electoral systems in advanced democracies," Economics Working Papers 367, Department of Economics and Business, Universitat Pompeu Fabra.
- Rein Taagepera, 2001. "Party Size Baselines Imposed by Institutional Constraints," Journal of Theoretical Politics, SAGE Publishing, vol. 13(4), pages 331-354, October.
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