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Efficient Competition Through Cheap Talk: The Case of Competing Auctions

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  • Kyungmin Kim
  • Philipp Kircher

Abstract

We consider a large market where auctioneers with private reservation values compete for bidders by announcing cheap‐talk messages. If auctioneers run efficient first‐price auctions, then there always exists an equilibrium in which each auctioneer truthfully reveals her type. The equilibrium is constrained efficient, assigning more bidders to auctioneers with larger gains from trade. The choice of the trading mechanism is crucial for the result. Most notably, the use of second‐price auctions (equivalently, ex post bidding) leads to the nonexistence of any informative equilibrium. We examine the robustness of our finding in various dimensions, including finite markets and equilibrium selection.

Suggested Citation

  • Kyungmin Kim & Philipp Kircher, 2015. "Efficient Competition Through Cheap Talk: The Case of Competing Auctions," Econometrica, Econometric Society, vol. 83(5), pages 1849-1875, September.
    • Handle: RePEc:wly:emetrp:v:83:y:2015:i:5:p:1849-1875
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    Cited by:

    1. Philippe Jehiel & Laurent Lamy, 2018. "A Mechanism Design Approach to the Tiebout Hypothesis," Journal of Political Economy, University of Chicago Press, vol. 126(2), pages 735-760.
    2. Gomis-Porqueras Pedro & Julien Benoît & Wang Liang, 2018. "Competitive Search with Ex-post Opportunism," The B.E. Journal of Theoretical Economics, De Gruyter, vol. 18(1), pages 1-17, January.
    3. Lester, Benjamin & Visschers, Ludo & Wolthoff, Ronald, 2015. "Dynamic Relational Contracts under Complete Information," SIRE Discussion Papers 2015-51, Scottish Institute for Research in Economics (SIRE).
    4. Shi, Shouyong, 2016. "Customer relationship and sales," Journal of Economic Theory, Elsevier, vol. 166(C), pages 483-516.
    5. Shouyong Shi, 2019. "Sequentially Mixed Search and Equilibrium Price Dispersion," 2019 Meeting Papers 322, Society for Economic Dynamics.
    6. Paul M. Anglin & Yanmin Gao, 2023. "Value of Communication and Social Media: An Equilibrium Theory of Messaging," The Journal of Real Estate Finance and Economics, Springer, vol. 66(4), pages 861-903, May.
    7. T. Tony Ke & Yuting Zhu, 2021. "Cheap Talk on Freelance Platforms," Management Science, INFORMS, vol. 67(9), pages 5901-5920, September.
    8. Lester, Benjamin & Visschers, Ludo & Wolthoff, Ronald, 2017. "Competing with asking prices," Theoretical Economics, Econometric Society, vol. 12(2), May.
    9. Mangin, Sephorah & Julien, Benoît, 2021. "Efficiency in search and matching models: A generalized Hosios condition," Journal of Economic Theory, Elsevier, vol. 193(C).
    10. Vladimir Pavlov & Ron Berman, 2019. "Price Manipulation in Peer-to-Peer Markets and the Sharing Economy," Working Papers 19-10, NET Institute.
    11. Mangin, Sephorah, 2017. "A theory of production, matching, and distribution," Journal of Economic Theory, Elsevier, vol. 172(C), pages 376-409.
    12. Derek Stacey, 2019. "Posted Prices, Search and Bargaining," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 33, pages 85-104, July.
    13. Randall Wright & Philipp Kircher & Benoit Julîen & Veronica Guerrieri, 2017. "Directed Search: A Guided Tour," NBER Working Papers 23884, National Bureau of Economic Research, Inc.
    14. Chen, Yu & Doyle, Matthew & Gonzalez, Francisco M., 2024. "Wages as signals of worker mobility," Theoretical Economics, Econometric Society, vol. 19(1), January.
    15. Auster, Sarah & Gottardi, Piero, 2019. "Competing mechanisms in markets for lemons," Theoretical Economics, Econometric Society, vol. 14(3), July.
    16. Wright, Randall & Xiao, Sylvia Xiaolin & Zhu, Yu, 2018. "Frictional capital reallocation I: Ex ante heterogeneity," Journal of Economic Dynamics and Control, Elsevier, vol. 89(C), pages 100-116.
    17. Siegenthaler, Simon, 2017. "Meet the lemons: An experiment on how cheap-talk overcomes adverse selection in decentralized markets," Games and Economic Behavior, Elsevier, vol. 102(C), pages 147-161.
    18. Poeschel, Friedrich, 2018. "Why do employers not pay less than advertised? Directed search and the Diamond paradox," MPRA Paper 87920, University Library of Munich, Germany.
    19. Thomas Kittsteiner & Marion Ott & Richard Steinberg, 2022. "Competing Combinatorial Auctions," Information Systems Research, INFORMS, vol. 33(4), pages 1130-1137, December.
    20. Auster, Sarah & Gottardi, Piero, 2019. "Competing mechanisms in markets for lemons," Theoretical Economics, Econometric Society, vol. 14(3), September.
    21. Banfi, Stefano & Choi, Sekyu & Villena-Roldán, Benjamín, 2022. "Sorting on-line and on-time," European Economic Review, Elsevier, vol. 146(C).
    22. Lee, Jaesun & Shapiro, Dmitry, 2023. "Quality communication via cheap-talk messages in experimental auctions," Journal of Economic Behavior & Organization, Elsevier, vol. 212(C), pages 74-107.
    23. Kloosterman, Andrew & Paul, Stephen, 2018. "Ultimatum game bargaining in a partially directed search market," Journal of Economic Behavior & Organization, Elsevier, vol. 154(C), pages 60-74.
    24. Lester, Benjamin & Visschers, Ludo & Wolthoff, Ronald, 2015. "Dynamic Relational Contracts under Complete Information," 2007 Annual Meeting, July 29-August 1, 2007, Portland, Oregon TN 2015-51, American Agricultural Economics Association (New Name 2008: Agricultural and Applied Economics Association).

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