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The Leader rule: a model of strategic approval voting in a large electorate


  • Jean-François Laslier

    () (X-DEP-ECO - Département d'Économie de l'École Polytechnique - X - École polytechnique)


The article considers Approval Voting for a large population of voters. It is supposed that voters evaluate the relative likelihood of pairwise ties among candidates based on statistical information about candidate scores. This leads them to vote sincerely and according to a simple behavioral rule we call the `Leader Rule'. At equilibrium, if a Condorcet-winner exists, this candidate is elected.

Suggested Citation

  • Jean-François Laslier, 2009. "The Leader rule: a model of strategic approval voting in a large electorate," Post-Print hal-00363218, HAL.
  • Handle: RePEc:hal:journl:hal-00363218
    DOI: 10.1177/0951629808097286
    Note: View the original document on HAL open archive server:

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    Cited by:

    1. Baujard, Antoinette & Gavrel, Frédéric & Igersheim, Herrade & Laslier, Jean-François & Lebon, Isabelle, 2018. "How voters use grade scales in evaluative voting," European Journal of Political Economy, Elsevier, vol. 55(C), pages 14-28.
    2. Núñez, Matías & Laslier, Jean-François, 2015. "Bargaining through Approval," Journal of Mathematical Economics, Elsevier, vol. 60(C), pages 63-73.
    3. Attanasi, Giuseppe & Corazzini, Luca & Passarelli, Francesco, 2017. "Voting as a lottery," Journal of Public Economics, Elsevier, vol. 146(C), pages 129-137.
    4. 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," PSE Working Papers halshs-01168743, HAL.
    5. Karine Van der Straeten & Jean-François Laslier & Nicolas Sauger & André Blais, 2010. "Strategic, sincere, and heuristic voting under four election rules: an experimental study," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 35(3), pages 435-472, September.
    6. François Durand & Antonin Macé & Matias Nunez, 2019. "Analysis of Approval Voting in Poisson Games," Working Papers halshs-02049865, HAL.
    7. François Maniquet & Massimo Morelli, 2015. "Approval quorums dominate participation quorums," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 45(1), pages 1-27, June.
    8. Jean-François Laslier & Karine van der Straeten, 2016. "Strategic Voting in Multi-Winner Elections with Approval Balloting: A Theory for Large Electorates," PSE - Labex "OSE-Ouvrir la Science Economique" halshs-01304688, HAL.
    9. Igerseim, Herrade & Baujard, Antoinette & Laslier, Jean-François, 2016. "La question du vote. Expérimentations en laboratoire et In Situ," L'Actualité Economique, Société Canadienne de Science Economique, vol. 92(1-2), pages 151-189, Mars-Juin.
    10. Núñez, Matías & Pivato, Marcus, 2019. "Truth-revealing voting rules for large populations," Games and Economic Behavior, Elsevier, vol. 113(C), pages 285-305.
    11. 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.
    12. Jean-François Laslier, 2009. "In Silico Voting Experiments," Working Papers hal-00390376, HAL.
    13. Goertz, Johanna M.M. & Maniquet, François, 2011. "On the informational efficiency of simple scoring rules," Journal of Economic Theory, Elsevier, vol. 146(4), pages 1464-1480, July.
    14. Isabelle Lebon & Antoinette Baujard & Frédéric Gavrel & Herrade Igersheim & Jean-François Laslier, 2017. "Ce que le vote par approbation révèle des préférences des électeurs français," Revue économique, Presses de Sciences-Po, vol. 68(6), pages 1063-1076.
    15. Vincent Pons & Clémence Tricaud, 2019. "Coordination and Bandwagon Effects of Candidate Rankings: Evidence from Runoff Elections," NBER Working Papers 26599, National Bureau of Economic Research, Inc.
    16. Núñez, Matías & Xefteris, Dimitrios, 2017. "Implementation via approval mechanisms," Journal of Economic Theory, Elsevier, vol. 170(C), pages 169-181.
    17. Antoinette Baujard & Herrade Igersheim & Frédéric Gavrel & Jean-François Laslier & Isabelle Lebon, 2018. "Sincere voting, strategic voting : A laboratory experiment using alternative proportional systems," Post-Print halshs-01652699, HAL.
    18. Su, Francis Edward & Zerbib, Shira, 2019. "Piercing numbers in approval voting," Mathematical Social Sciences, Elsevier, vol. 101(C), pages 65-71.
    19. Jean-François Laslier & Karine van der Straeten, 2015. "Strategic Voting under Committee Approval: A Theory," PSE Working Papers halshs-01168767, HAL.
    20. Marc Guinjoan & Pablo Simón & Sandra Bermúdez & Ignacio Lago, 2014. "Expectations in Mass Elections: Back to the Future?," Social Science Quarterly, Southwestern Social Science Association, vol. 95(5), pages 1346-1359, December.
    21. Alós-Ferrer, Carlos & Buckenmaier, Johannes, 2019. "Strongly sincere best responses under approval voting and arbitrary preferences," Games and Economic Behavior, Elsevier, vol. 117(C), pages 388-401.


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