Etienne Billette De Villemeur (GREMAQ - Groupe de recherche en économie mathématique et quantitative - CNRS : UMR5604 - Université des Sciences Sociales - Toulouse I - Ecole des Hautes Etudes en Sciences Sociales) Laurent Flochel (CRA - Charles River Associates International - Charles River Associates International) Bruno Versaevel () (GATE - Groupe d'analyse et de théorie économique - CNRS : UMR5824 - Université Lumière - Lyon II - Ecole Normale Supérieure Lettres et Sciences Humaines)
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Collusion sustainability depends on firms' aptitude to impose sufficiently severe punishments in case of deviation from the collusive rule. We characterize the ability of oligopolistic firms to implement a collusive strategy when their ability to punish deviations over one or several periods is limited by a severity constraint. It captures all situations in which either structural conditions (the form of payoff functions), institutional circumstances (a regulation), or financial considerations (profitability requirements) set a lower bound to firms' losses. The model specifications encompass the structural assumptions (A1-A3) in Abreu (1986) [Journal of Economic Theory, 39, 191-225]. The optimal punishment scheme is characterized, and the expression of the lowest discount factor for which collusion can be sustained is computed, that both depend on the status of the severity constraint. This extends received results from the literature to a large class of models that include a severity constraint, and uncovers the role of structural parameters that facilitate collusion by relaxing the constraint.
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Length: Date of creation: 2009 Date of revision: Handle: RePEc:hal:journl:halshs-00375798_v1
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Etienne Billette de Villemeur & Laurent Flochel & Bruno Versaevel, 2009.
"Optimal Collusion with Limited Severity Constraint,"
Working Papers
0909, Groupe d'Analyse et de Théorie Economique (GATE), Centre national de la recherche scientifique (CNRS), Université Lyon 2, Ecole Normale Supérieure.
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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.:
Susan Athey & Kyle Bagwell & Chris Sanchirico, 1998.
"Collusion and Price Rigidity,"
Working papers
98-23, Massachusetts Institute of Technology (MIT), Department of Economics.
Other versions:
Kyle Bagwell & Robert W. Staiger, 1995.
"Collusion Over the Business Cycle,"
Discussion Papers
1118, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
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