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One Round versus Two Round Elections: An Experimental Study


  • André Blais

    (Université de Montréal [Montréal])

  • Jean-François Laslier

    () (CECO - Laboratoire d'économétrie de l'École polytechnique - X - École polytechnique - CNRS - Centre National de la Recherche Scientifique)

  • Annie Laurent

    (Université de Lille, Droit et Santé)

  • Nicolas Sauger

    () (CEVIPOF - Centre de recherches politiques de Sciences Po - CNRS - Centre National de la Recherche Scientifique - Sciences Po - Sciences Po)

  • Karine van der Straeten

    (PSE - La plante et son environnement - INRA - Institut National de la Recherche Agronomique - UP11 - Université Paris-Sud - Paris 11 - INA P-G - Institut National Agronomique Paris-Grignon - CNRS - Centre National de la Recherche Scientifique)


The paper presents a series of experiments in which participants were invited to vote in four one round elections and four two round elections, with the same set of five candidates, among which three were viable and two were not. The experiments were designed to test the arguments put forward by Duverger and Cox about the propensity to vote sincerely or strategically in one round and two round elections. Our findings indicate little difference between the two systems. In both systems, there was a strong tendency to strategically desert the unviable candidates. The data thus support Cox over Duverger.

Suggested Citation

  • André Blais & Jean-François Laslier & Annie Laurent & Nicolas Sauger & Karine van der Straeten, 2007. "One Round versus Two Round Elections: An Experimental Study," Working Papers hal-00243055, HAL.
  • Handle: RePEc:hal:wpaper:hal-00243055
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    Cited by:

    1. 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.
    2. 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.
    3. Sebastian Kube & Clemens Puppe, 2009. "(When and how) do voters try to manipulate?," Public Choice, Springer, vol. 139(1), pages 39-52, April.
    4. André Blais & Jean-François Laslier & Nicolas Sauger & Karine van der Straeten, 2008. "Sincere, strategic, and heuristic voting under four election rules: An experimental study," Working Papers hal-00335046, HAL.
    5. Antoinette Baujard & Herrade Igersheim, 2007. "Expérimentation du vote par note et du vote par approbation lors de l'élection présidentielle française du 22 avril 2007," Post-Print halshs-00337290, HAL.
    6. André Blais & Simon Labbé-St-Vincent & Jean-François Laslier & Nicolas Sauger & Karine van der Straeten, 2008. "Vote choice in one round and two round elections," Working Papers hal-00335060, HAL.

    More about this item


    Vote stratégique; Cox; Duverger; Strategic Voting;


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