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Partial Language Competence

Author

Listed:
  • Jeanne Hagenbach

    (ECON - Département d'économie (Sciences Po) - Sciences Po - Sciences Po - CNRS - Centre National de la Recherche Scientifique, X - École polytechnique, CEPR - Center for Economic Policy Research - CEPR)

  • Frédéric Koessler

    (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)

Abstract

This paper proposes an equilibrium concept, Language-Based Expectation Equilibrium, which accounts for partial language understanding in sender-receiver cheap talk games. Each player is endowed with a privately known language competence which represents all the messages that he understands. For the messages he does not understand, he has correct but only coarse expectations about the equilibrium strategies of the other player. In general, a language-based expectation equilibrium outcome differs from Nash and communication equilibrium outcomes, but is always a Bayesian solution. Partial language competence of the sender rationalizes information transmission and lies in pure persuasion problems, and facilitates information transmission from a moderately biased sender.

Suggested Citation

  • Jeanne Hagenbach & Frédéric Koessler, 2019. "Partial Language Competence," SciencePo Working papers hal-03393108, HAL.
  • Handle: RePEc:hal:wpspec:hal-03393108
    Note: View the original document on HAL open archive server: https://sciencespo.hal.science/hal-03393108
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    References listed on IDEAS

    as
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    More about this item

    Keywords

    Analogy-based expectations; Bayesian solution; Bounded rationality; cheap talk; Language; Pure persuasion; Strategic information transmission;
    All these keywords.

    JEL classification:

    • C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design

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