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An Evolutionary Analysis of Pre-Play Communication and Efficiency in Games

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Author Info
Kenichi Amaya (Research Institute for Economics and Business Administration, Kobe University)
Abstract

This paper studies the effects of pre-play communication on equilibrium selection in 2×2 symmetric coordination games. The players repeatedly play a coordination game preceded by an opportunity to exchange payoff irrelevant messages and gradually adjust their behavior. In short run, the players' access to the actions of the coordination game may be restricted. While the players can revise the set of accessible actions only occasionally, they frequently adjust their behavior in the cheap-talk game, taking the set of currently available actions as given. We obtain an efficient-equilibrium-selection result if the under-lying coordination game satisfies the self-signalling condition. On the other hand, if the game is not self-signalling, both the efficient and the inefficient equilibrium outcomes are stable.

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File URL: http://www.rieb.kobe-u.ac.jp/academic/ra/dp/English/dp165.pdf
File Format: application/pdf
File Function: First version, 2004
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Publisher Info
Paper provided by Research Institute for Economics & Business Administration, Kobe University in its series Discussion Paper Series with number 165.

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Length: 25 pages
Date of creation: Nov 2004
Date of revision:
Handle: RePEc:kob:dpaper:165

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Related research
Keywords: coordination games; communication; evolution; efficiency; cheap talk.;

Find related papers by JEL classification:
C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games

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  1. John C. Harsanyi & Reinhard Selten, 1988. "A General Theory of Equilibrium Selection in Games," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262582384.
  2. Kandori, Michihiro & Mailath, George J & Rob, Rafael, 1993. "Learning, Mutation, and Long Run Equilibria in Games," Econometrica, Econometric Society, vol. 61(1), pages 29-56, January. [Downloadable!] (restricted)
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  3. Farrell, Joseph & Rabin, Matthew, 1996. "Cheap Talk," Journal of Economic Perspectives, American Economic Association, vol. 10(3), pages 103-18, Summer. [Downloadable!] (restricted)
  4. Warneryd, Karl, 1991. "Evolutionary stability in unanimity games with cheap talk," Economics Letters, Elsevier, vol. 36(4), pages 375-378, August. [Downloadable!] (restricted)
  5. Robson, A.J., 1989. "Efficiency In Evolutionary Games: Darwin, Nash And Secret Handshake," Papers 89-22, Michigan - Center for Research on Economic & Social Theory.
  6. Carlsson, Hans & van Damme, Eric, 1993. "Global Games and Equilibrium Selection," Econometrica, Econometric Society, vol. 61(5), pages 989-1018, September. [Downloadable!] (restricted)
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  7. Sandeep Baliga & Stephen Morris, 2000. "Coordination, Spillovers, and Cheap Talk," Discussion Papers 1301, Northwestern University, Center for Mathematical Studies in Economics and Management Science. [Downloadable!]
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  8. Young, H Peyton, 1993. "The Evolution of Conventions," Econometrica, Econometric Society, vol. 61(1), pages 57-84, January. [Downloadable!] (restricted)
  9. Matsui, Akihiko, 1992. "Best response dynamics and socially stable strategies," Journal of Economic Theory, Elsevier, vol. 57(2), pages 343-362, August. [Downloadable!] (restricted)
  10. Akihiko Matsui, 1989. "Cheap Talk and Cooperation in the Society," Discussion Papers 848, Northwestern University, Center for Mathematical Studies in Economics and Management Science. [Downloadable!]
  11. Matsui, Akihiko, 1991. "Cheap-talk and cooperation in a society," Journal of Economic Theory, Elsevier, vol. 54(2), pages 245-258, August. [Downloadable!] (restricted)
  12. Blume, Andreas, 1998. "Communication, Risk, and Efficiency in Games," Games and Economic Behavior, Elsevier, vol. 22(2), pages 171-202, February. [Downloadable!] (restricted)
  13. Kim, Yong-Gwan & Sobel, Joel, 1995. "An Evolutionary Approach to Pre-play Communication," Econometrica, Econometric Society, vol. 63(5), pages 1181-93, September. [Downloadable!] (restricted)
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  14. Swinkels, Jeroen M., 1992. "Evolutionary stability with equilibrium entrants," Journal of Economic Theory, Elsevier, vol. 57(2), pages 306-332, August. [Downloadable!] (restricted)
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  15. Gilboa, Itzhak & Matsui, Akihiko, 1991. "Social Stability and Equilibrium," Econometrica, Econometric Society, vol. 59(3), pages 859-67, May. [Downloadable!] (restricted)
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