Strategic Experimentation with Private Payoffs

Sven Rady, Paul Heidhues () and Philipp Strack ()

No 10634, CEPR Discussion Papers from C.E.P.R. Discussion Papers

Abstract: We consider a game of strategic experimentation in which players face identical discrete-time bandit problems with a safe and a risky arm. In any period, the risky arm yields either a success or a failure, and the first success reveals the risky arm to dominate the safe one. When payoffs are public information, the ensuing free-rider problem is so severe that equilibrium experimentation ceases at the same threshold belief at which a single agent would stop, even if players can coordinate their actions through mediated communication. When payoffs are private information and the success probability on the risky arm is not too high, however, the socially optimal symmetric experimentation profile can be supported as a perfect Bayesian equilibrium for sufficiently optimistic prior beliefs, even if players can only communicate via binary cheap-talk messages.

Keywords: Bayesian learning; Cheap talk; Information externality; Mediated communication; Strategic experimentation; Two-armed bandit (search for similar items in EconPapers)
JEL-codes: C73 D83 (search for similar items in EconPapers)
Date: 2015-05
New Economics Papers: this item is included in nep-gth and nep-mic
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (44)

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Related works:
Journal Article: Strategic experimentation with private payoffs (2015)
Working Paper: Strategic Experimentation with Private Payoffs (2012)
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