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Incomplete information, proportional representation and strategic voting

Author

Listed:
  • Orestis Troumpounis

    () (Lancaster University)

  • Dimitrios Xefteris

    () (University of Cyprus)

Abstract

Abstract We introduce incomplete information to a multiparty election under proportional representation: each voter knows her preferences and votes strategically to maximize her payoffs, but is uncertain about the number and the preferences of the other voters. Parties are assumed to be purely office motivated and, hence, the resulting governments are always minimum winning. In this framework, we prove (a) generic existence of equilibria where only two parties receive a positive fraction of the votes and therefore lead to single-party governments and (b) generic inexistence of equilibria that lead to coalition governments. That is, contrary to common wisdom, a proportional rule is found not to promote sincere voting and to be favorable towards single-party governments. The existence of two-party equilibria that lead to single-party governments is robust to parties having ideological concerns.

Suggested Citation

  • Orestis Troumpounis & Dimitrios Xefteris, 2016. "Incomplete information, proportional representation and strategic voting," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 47(4), pages 879-903, December.
  • Handle: RePEc:spr:sochwe:v:47:y:2016:i:4:d:10.1007_s00355-016-0995-7
    DOI: 10.1007/s00355-016-0995-7
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    References listed on IDEAS

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    More about this item

    JEL classification:

    • D72 - Microeconomics - - Analysis of Collective Decision-Making - - - Political Processes: Rent-seeking, Lobbying, Elections, Legislatures, and Voting Behavior

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