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Language, meaning and games: a model of communication, coordination and evolution

  • Stefano Demichelis
  • Jörgen W. Weibull

Language is arguably a powerful coordination device in real-life interactions. We here develop a game-theoretic model of two-sided pre-play communication that generalizes the cheap-talk approach by way of introducing a meaning correspondence between messages and actions, and postulating two axioms met by natural languages. Deviations from this correspondence are called dishonest and players have a lexicographic preference for honesty, second to material payoffs. The model is first applied to finite and symmetric two-player games and we establish that, in generic and symmetric n x n -coordination games, a Nash equilibrium component in such a lexicographic communication game is evolutionarily stable if and only if it results in the unique Pareto efficient outcome of the underlying game. We discus Aumann’s (1990) example of a Pareto efficient equilibrium that is not self-enforcing. We also extend the approach to one-sided communication.

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Paper provided by Collegio Carlo Alberto in its series Carlo Alberto Notebooks with number 61.

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Length: 26 pages
Date of creation: 2007
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Handle: RePEc:cca:wpaper:61
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