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Collusion Sustainability with Multimarket Contacts: Revisiting HHI Tests

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Author Info
Edmond Baranes
Francois Mirabel
Jean-Christophe Poudou

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Abstract

Our paper focuses on the relationship between market concentration and collusion sustainability in a framework of multimarket contacts. We consider two independent and symmetric markets in which a subset of firms are active in both markets. When firms are able to transfer market power from one market to another, firms have strong incentives to collude even in a highly competitive market. This result is relevant for competition policy since assessing market concentration using HHI index could be misleading in some situations.

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File URL: http://www.lameta.univ-montp1.fr/Fr/Productions/Documents/DR2009-05.pdf
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File Function: First version, 2009
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Publisher Info
Paper provided by LAMETA, Universtiy of Montpellier in its series Working Papers with number 09-05.

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Length: 15 pages
Date of creation: Mar 2009
Date of revision: Mar 2009
Handle: RePEc:lam:wpaper:09-05

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Web page: http://www.lameta.univ-montp1.fr/
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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.:
  1. Brock, William A & Scheinkman, Jose A, 1985. "Price Setting Supergames with Capacity Constraints," Review of Economic Studies, Blackwell Publishing, vol. 52(3), pages 371-82, July. [Downloadable!] (restricted)
  2. Davidson, Carl & Deneckere, Raymond, 1984. "Horizontal mergers and collusive behavior," International Journal of Industrial Organization, Elsevier, vol. 2(2), pages 117-132, June. [Downloadable!] (restricted)
  3. Ivaldi, Marc & Jullien, Bruno & Rey, Patrick & Seabright, Paul & Tirole, Jean, 2003. "The Economics of Tacit Collusion," IDEI Working Papers 186, Institut d'Économie Industrielle (IDEI), Toulouse. [Downloadable!]
  4. Compte, Olivier & Jenny, Frederic & Rey, Patrick, 2002. "Capacity constraints, mergers and collusion," European Economic Review, Elsevier, vol. 46(1), pages 1-29, January. [Downloadable!] (restricted)
  5. B. Douglas Bernheim & Michael D. Whinston, 1990. "Multimarket Contact and Collusive Behavior," RAND Journal of Economics, The RAND Corporation, vol. 21(1), pages 1-26, Spring. [Downloadable!] (restricted)
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This page was last updated on 2009-11-16.

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