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Communicating on electoral platforms

Author

Listed:
  • Gabrielle Demange

    (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, PJSE - Paris Jourdan Sciences Economiques - 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 - EHESS - École des hautes études en sciences sociales - CNRS - Centre National de la Recherche Scientifique - INRAE - Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement, CNRS - Centre National de la Recherche Scientifique)

Abstract
This paper proposes an analysis of strategic communication on platforms by candidates during an electoral campaign. A candidate's platform in a (possibly) multidimensional policy space is fixed, but is imperfectly known by voters. A candidate strategically decides the emphasis he puts on the various issues, and thus the precision of the information he conveys to voters on his position on each issue. We show that if voters are fully rational, then all the relevant information is revealed at equilibrium, whatever the candidate's true position. We then study a model of boundedly rational voters, who take at face value the messages sent by the politicians, without being able to decipher their strategies. If voters are boundedly rational in this sense, a politician will not transmit all the relevant information; his communication strategy will depend on both the prior in the electorate and his true positions (unknown to the electorate). In particular, we show that candidates address all issues with positive probability, but tend to talk more often on issues on which they are a priori congruent with the representative voter, thereby providing a "nuanced" version of Petrocik's "issue ownership theory".

Suggested Citation

  • Gabrielle Demange & Karine van Der Straeten, 2020. "Communicating on electoral platforms," PSE-Ecole d'économie de Paris (Postprint) hal-02923883, HAL.
    • Handle: RePEc:hal:pseptp:hal-02923883
    DOI: 10.1016/j.jebo.2017.03.006
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