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Long persuasion games

Frederic Koessler and Francoise Forges

PSE-Ecole d'économie de Paris (Postprint) from HAL

Abstract: This paper characterizes geometrically the sets of all Nash and perfect Bayesian equilibrium payoffs achievable with unmediated communication in persuasion games, i.e., games with an informed expert and an uninformed decisionmaker in which the expert's information is certifiable. The first equilibrium characterization is provided for unilateral persuasion games, and the second for multistage, bilateral persuasion games. As in Aumann and Hart [R.J. Aumann, S. Hart, Long cheap talk, Econometrica 71 (6) (2003) 1619-1660], we use the concepts of diconvexification and dimartingale. A leading example illustrates both geometric characterizations and shows how the expert, whatever his type, can increase his equilibrium payoff compared to all equilibria of the unilateral persuasion game by delaying information certification.

Keywords: Belief consistency; Cheap talk; Diconvexification; Dimartingale; Disclosure of certifiable information; Jointly controlled lotteries; Long conversation; Persuasion; Sequential rationality; Verifiable types (search for similar items in EconPapers)
Date: 2008
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Citations: View citations in EconPapers (20)

Published in Journal of Economic Theory, 2008, 143, pp.1-35. ⟨10.1016/j.jet.2007.02.006⟩

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Persistent link: https://EconPapers.repec.org/RePEc:hal:pseptp:hal-00360719

DOI: 10.1016/j.jet.2007.02.006

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