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On Interdependent Supergames: Multimarket Contact, Concavity, and Collusion

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Author Info
Spagnolo, G.

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Abstract

This paper addresses the effects of multimarket contact on firms’ ability to collude. Real world imperfections tend to makes firms’ objective function strictly concave and market supergames ‘interdependent’: firms’ payoffs in each market depend on how they are doing in others. Then, multimarket contact always facilitates collusion. It may even make it sustainable in all markets when otherwise it would not be sustainable in any. The effects of conglomeration are discussed. ‘Multi-game contact’ is shown to facilitate cooperation in non-oligopolistic supergames as long as agents’ objectives function is submodular in material payoffs.

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Paper provided by Faculty of Economics, University of Cambridge in its series Cambridge Working Papers in Economics with number 9914.

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Date of creation: Mar 1999
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Handle: RePEc:cam:camdae:9914

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Related research
Keywords: Repeated games; Oligopoly; Collusion; Cooperation; Conglomeration; Mergers;

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Find related papers by JEL classification:
C72 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Noncooperative Games
D43 - Microeconomics - - Market Structure and Pricing - - - Oligopoly and Other Forms of Market Imperfection
L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
L21 - Industrial Organization - - Firm Objectives, Organization, and Behavior - - - Business Objectives of the Firm

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References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:
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  13. McCutcheon, Barbara, 1997. "Do Meetings in Smoke-Filled Rooms Facilitate Collusion?," Journal of Political Economy, University of Chicago Press, vol. 105(2), pages 330-50, April.
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Full references

Cited by:
(explanations, Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.)

  1. Giancarlo Spagnolo & Steffen Lippert, 2004. "Networks of Relations," Econometric Society 2004 North American Winter Meetings 496, Econometric Society. [Downloadable!]
    Other versions:
  2. Spagnolo, Giancarlo, 2002. "Globalization and Cooperative Relations," CEPR Discussion Papers 3522, C.E.P.R. Discussion Papers. [Downloadable!] (restricted)
  3. Lippert, Steffen & Spagnolo, Giancarlo, 2005. "Networks of Relations and Social Capital," CEPR Discussion Papers 5078, C.E.P.R. Discussion Papers. [Downloadable!] (restricted)
  4. Jay Pil Choi & Heiko Gerlach, 2009. "Multi-Market Collusion with Demand Linkages and Antitrust Enforcement," CESifo Working Paper Series CESifo Working Paper No. , CESifo Group Munich. [Downloadable!]
  5. Nuno Limão, 2002. "Trade policy, cross-border externalities and lobbies: do linked agreements enforce more cooperative outcomes?," International Trade 0206002, EconWPA, revised 28 Jul 2002. [Downloadable!]
    Other versions:
  6. Suchan Chae & Paul Heidhues, 2003. "Buyers’ Alliances for Bargaining Power," CIG Working Papers SP II 2003-24, Wissenschaftszentrum Berlin (WZB), Research Unit: Competition and Innovation (CIG). [Downloadable!]
    Other versions:
  7. John R. Conlon, 2005. "Seemingly Unrelated Repeated Games," Game Theory and Information 0511004, EconWPA. [Downloadable!]
  8. Luis M. B. Cabral, 2003. "An Equilibrium Approach to International Merger Policy," Working Papers 03-25, New York University, Leonard N. Stern School of Business, Department of Economics. [Downloadable!]
    Other versions:
  9. Lucio Fuentelsaz & Jaime Gómez, . "Multipoint Competition, Mutual Forbearance and Entry into Geographic Markets," Studies on the Spanish Economy 127, FEDEA. [Downloadable!]
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