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Truthful Revelation Mechanisms for Simultaneous Common Agency Games

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  • Alessandro Pavan
  • Giacomo Calzolari

Abstract

This paper considers games in which multiple principals contract simultaneously with the same agent. We introduce a new class of revelation mechanisms that, although it does not always permit a complete equilibrium characterization, it facilitates the characterization of the equilibrium outcomes that are typically of interest in applications (those sustained by pure-strategy profiles in which the agent's behavior in each relationship is Markov, i.e., it depends only on payoff-relevant information such as the agent's type and the decisions he is inducing with the other principals). We then illustrate how these mechanisms can be put to work in environments such as menu auctions, competition in nonlinear tariffs, and moral hazard settings. Lastly, we show how one can enrich the revelation mechanisms, albeit at a cost of an increase in complexity, to characterize also equilibrium outcomes sustained by non-Markov strategies and/or mixed-strategy profiles.

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Bibliographic Info

Paper provided by Collegio Carlo Alberto in its series Carlo Alberto Notebooks with number 85.

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Length: 51 pages
Date of creation: 2008
Date of revision:
Handle: RePEc:cca:wpaper:85

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Keywords: Mechanism design; contracts; revelation principle; menus; endogenous payoff-relevant information;

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References

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  1. Peters, Michael & Troncoso-Valverde, Cristian, 2010. "A Folk Theorem for Competing Mechanisms," Microeconomics.ca working papers michael_peters-2010-17, Vancouver School of Economics, revised 19 Oct 2013.
  2. Han, Seungjin, 2004. "Menu Theorems for Bilateral Contracting," Microeconomics.ca working papers han-04-01-29-10-05-13, Vancouver School of Economics, revised 29 Jan 2004.
  3. Attar, Andrea & Majumdar, Dipjyoti & Piaser, Gwenaël & Porteiro, Nicolás, 2008. "Common agency games: Indifference and separable preferences," Mathematical Social Sciences, Elsevier, vol. 56(1), pages 75-95, July.
  4. Biais, Bruno & Martimort, David & Rochet, Jean-Charles, 1998. "Competing Mechanisms in a Commun Value Environment," IDEI Working Papers 75, Institut d'Économie Industrielle (IDEI), Toulouse.
  5. Attar, Andrea & Piaser, Gwenael & Porteiro, Nicolas, 2007. "Negotiation and take-it or leave-it in common agency with non-contractible actions," Journal of Economic Theory, Elsevier, vol. 135(1), pages 590-593, July.
  6. Dixit, Avinash & Grossman, Gene M & Helpman, Elhanan, 1997. "Common Agency and Coordination: General Theory and Application to Government Policy Making," Journal of Political Economy, University of Chicago Press, vol. 105(4), pages 752-69, August.
  7. B. Douglas Bernheim & Michael D. Whinston, 1985. "Common Marketing Agency as a Device for Facilitating Collusion," RAND Journal of Economics, The RAND Corporation, vol. 16(2), pages 269-281, Summer.
  8. Piaser, Gwenaël, 2007. "Direct Mechanisms, Menus and Latent Contracts," MPRA Paper 7049, University Library of Munich, Germany.
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Citations

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Cited by:
  1. Calzolari, Giacomo & Denicolo, Vincenzo, 2009. "Competition with exclusive contracts and market-share discounts," CEPR Discussion Papers 7613, C.E.P.R. Discussion Papers.
  2. Ghosh, Sambuddha & Han, Seungjin, 2012. "Repeated Contracting in Decentralised Markets," Microeconomics.ca working papers seungjin_han-2012-12, Vancouver School of Economics, revised 02 May 2013.
  3. Han, Seungjin, 2012. "On take it or leave it offers in common agency," Economics Letters, Elsevier, vol. 117(3), pages 777-781.
  4. Han, Seungjin, 2011. "Implicit Collusion in Non-Exclusive Contracting under Adverse Selection," Microeconomics.ca working papers seungjin_han-2011-10, Vancouver School of Economics, revised 02 Apr 2013.
  5. Attar, Andrea & Majumdar, Dipjyoti & Piaser, Gwenaël & Porteiro, Nicolás, 2008. "Common agency games: Indifference and separable preferences," Mathematical Social Sciences, Elsevier, vol. 56(1), pages 75-95, July.
  6. Simone Galperti, 2011. "Common Agency with Informed Principals: Menus and Signals," Discussion Papers 1541, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  7. Andrea Attar & Eloisa Campioni & Gwenael Piaser & Uday Rajan, 2011. "Competing Mechanism Games of Moral Hazard: Communication and Robustness," CEIS Research Paper 196, Tor Vergata University, CEIS, revised 10 Jun 2011.
  8. Gabor Virag, 2008. "Buyer heterogeneity and competing mechanism," 2008 Meeting Papers 702, Society for Economic Dynamics.

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