Type
Working paper
Titre
Partial Language Competence
Dans
Sciences Po Economics Discussion Papers
Auteur(s)
HAGENBACH Jeanne - Département d'économie (Auteur)
KOESSLER Frédéric - Ecole d'Économie de Paris - Paris School of Economics (PSE) (Auteur)
Éditeur
Paris : Département d'économie de Sciences Po
Collection
Sciences Po Economics Discussion Papers : 2019-08
Mots clés
Analogy-based expectations, Bayesian solution, Bounded rationality, cheap talk, Language, Pure persuasion, Strategic information transmission
Résumé
EN
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.

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