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Strategic Voting under Committee Approval: An Application to the 2011 Regional Government Election in Zurich

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  • Romain Lachat

    (UPF - Universitat Pompeu Fabra [Barcelona])

  • Jean-François Laslier

    (PSE - Paris-Jourdan Sciences Economiques - ENS-PSL - École normale supérieure - Paris - PSL - Université Paris sciences et lettres - INRA - Institut National de la Recherche Agronomique - EHESS - École des hautes études en sciences sociales - ENPC - École des Ponts ParisTech - CNRS - Centre National de la Recherche Scientifique, PSE - Paris School of Economics - UP1 - Université Paris 1 Panthéon-Sorbonne - ENS-PSL - École normale supérieure - Paris - PSL - Université Paris sciences et lettres - EHESS - École des hautes études en sciences sociales - ENPC - École des Ponts ParisTech - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement)

  • Karine van Der Straeten

    (TSE-R - Toulouse School of Economics - UT Capitole - Université Toulouse Capitole - UT - Université de Toulouse - INRA - Institut National de la Recherche Agronomique - EHESS - École des hautes études en sciences sociales - CNRS - Centre National de la Recherche Scientifique, IAST - Institute for Advanced Study in Toulouse)

Abstract

In several cantons in Switzerland the regional government, i.e. a set of governors who share the executive power in the canton, is elected according to an original voting rule, in which voters can vote for several candidates (up to a maximal number of votes). Up to some details, these elections are instances of what is known in Social Choice Theory as "Committee Approval Voting". The paper makes use of data from a panel survey collected during the 2011 Zurich cantonal election to check whether a strategic voting theory is consistent with individual behaviour observed during that election. We show that roughly 70% of the individual decisions on candidates are consistent with our model of rational voting.

Suggested Citation

  • Romain Lachat & Jean-François Laslier & Karine van Der Straeten, 2015. "Strategic Voting under Committee Approval: An Application to the 2011 Regional Government Election in Zurich," Working Papers halshs-01168743, HAL.
    • Handle: RePEc:hal:wpaper:halshs-01168743
    Note: View the original document on HAL open archive server: https://shs.hal.science/halshs-01168743
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    References listed on IDEAS

    as
    1. Myerson, Roger B. & Weber, Robert J., 1993. "A Theory of Voting Equilibria," American Political Science Review, Cambridge University Press, vol. 87(1), pages 102-114, March.
    2. Jean-François Laslier, 2009. "The Leader rule: a model of strategic approval voting in a large electorate," Post-Print hal-00363218, HAL.
    3. Jean-François Laslier, 2009. "The Leader Rule," Journal of Theoretical Politics, , vol. 21(1), pages 113-136, January.
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    Cited by:

    1. Jean-François Laslier & Karine Straeten, 2016. "Strategic voting in multi-winner elections with approval balloting: a theory for large electorates," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 47(3), pages 559-587, October.

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    Keywords

    Switzerland; Strategic Voting;

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