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Colluding on Participation Decisions

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Author Info

  • Gregory Pavlov

    ()
    (Boston University, Department of Economics)

Abstract

We study the principal’s optimal response to collusion in an adverse selection environment. Building on the framework of Laffont and Martimort (1997, 2000) we advance it into several directions. First, unlike most of the literature, we study a stronger collusion when the agents can coordinate their participation decisions in addition to the joint play of the mechanism. Second, we make precise the economic nature of the transaction costs due to the presence of the asymmetric information in the collusive problem. Finally, while most of the literature focused on the two-type distributions, in our model the private information is distributed continuously. We characterize the set of implementable collusion-proof outcomes of the game, and relate it to the interim incentive-efficiency, which is a standard concept of efficiency under asymmetric information. After that we solve the principal’s problem by optimizing over a restricted set of mechanisms, which turn out to be optimal in a class of cases and allow the principal to fight collusion off at no cost.

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Bibliographic Info

Paper provided by Boston University - Department of Economics in its series Boston University - Department of Economics - Working Papers Series with number WP2006-030.

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Length: 42 pages
Date of creation: May 2006
Date of revision:
Handle: RePEc:bos:wpaper:wp2006-030

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Related research

Keywords: Collusion; Mechanism design; Auctions;

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Cited by:
  1. Che, Yeon-Koo & Kim, Jinwoo, 2007. "Optimal Collusion-Proof Auctions," MPRA Paper 6098, University Library of Munich, Germany.
  2. Sandeep Baliga & Tomas Sjöström, 2009. "Contracting with Third Parties," American Economic Journal: Microeconomics, American Economic Association, vol. 1(1), pages 75-100, February.
  3. Jansen, Jos & Jeon, Doh-Shin & Menicucci, Domenico, 2008. "The organization of regulated production: Complementarities, correlation and collusion," International Journal of Industrial Organization, Elsevier, vol. 26(1), pages 327-353, January.
  4. Nicolas Gruyer, 2008. "Optimal Auctions when a seller is bound to sell to collusive bidders (new version of "using lotteries ...")," Economics Working Papers 06, LEEA (air transport economics laboratory), ENAC (french national civil aviation school).
  5. Dequiedt, V., 2006. "Ratification and veto constraints in mechanism design," Working Papers 200606, Grenoble Applied Economics Laboratory (GAEL).
  6. Celik, Gorkem, 2004. "Mechanism Design with Collusive Supervision," Microeconomics.ca working papers celik-04-09-13-05-42-19, Vancouver School of Economics, revised 06 Aug 2008.
  7. Dequiedt, V., 2006. "Efficient collusion in optimal auctions," Working Papers 200607, Grenoble Applied Economics Laboratory (GAEL).
  8. Celik, Gorkem, 2004. "Counter Marginalization of Information Rents under Collusion," Microeconomics.ca working papers celik-04-01-23-02-48-07, Vancouver School of Economics, revised 27 Jan 2008.

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