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Does Vertical Integration Promote Downstream Incomplete Collusion? An Evaluation of Static and Dynamic Stability

  • Mariana Cunha


    (FEP-UP, School of Economics and Management)

  • Paula Sarmento


    (CEF.UP, Research Center in Economics and Finance, University of Porto and FEP-UP)

This paper analyzes the impact of vertical integration on the static and dynamic stability of downstream incomplete collusion. It is shown that a vertical merger between an upstream firm and a downstream cartel or fringe firm promotes downstream collusion, under certain conditions on the market size. However, for low market concentration, a vertical merger with a cartel firm hinders collusion. Moreover, a welfare analysis shows that consumer surplus increases with the vertical merger because the merger partially eliminates the double marginalization problem.

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Paper provided by Universidade do Porto, Faculdade de Economia do Porto in its series FEP Working Papers with number 465.

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Length: 35 pages
Date of creation: Aug 2012
Date of revision:
Handle: RePEc:por:fepwps:465
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  8. James W. Friedman, 1971. "A Non-cooperative Equilibrium for Supergames," Review of Economic Studies, Oxford University Press, vol. 38(1), pages 1-12.
  9. Volker Nocke & Lucy White, 2007. "Do Vertical Mergers Facilitate Upstream Collusion?," American Economic Review, American Economic Association, vol. 97(4), pages 1321-1339, September.
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  13. Yongmin Chen & Michael H. Riordan, 2007. "Vertical integration, exclusive dealing, and expost cartelization," RAND Journal of Economics, RAND Corporation, vol. 38(1), pages 1-21, 03.
  14. Marc Escrihuela, 2002. "Cartel Sustainability And Cartel Stability," Working Papers. Serie AD 2002-16, Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie).
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  17. Normann, Hans-Theo, 2009. "Vertical integration, raising rivals' costs and upstream collusion," European Economic Review, Elsevier, vol. 53(4), pages 461-480, May.
  18. Donsimoni, Marie-Paule & Economides, Nicholas S & Polemarchakis, Herakles M, 1986. "Stable Cartels," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 27(2), pages 317-27, June.
  19. Nocke, Volker & White, Lucy, 2010. "Vertical Merger, Collusion, and Disruptive Buyers," CEPR Discussion Papers 7722, C.E.P.R. Discussion Papers.
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  21. Marc Escrihuela Villar, 2008. "A note on cartel stability and endogenous sequencing with tacit collusion," DEA Working Papers 29, Universitat de les Illes Balears, Departament d'Economía Aplicada.
  22. Stephen W. Salant & Sheldon Switzer & Robert J. Reynolds, 1983. "Losses From Horizontal Merger: The Effects of an Exogenous Change in Industry Structure on Cournot-Nash Equilibrium," The Quarterly Journal of Economics, Oxford University Press, vol. 98(2), pages 185-199.
  23. Marc Escrihuela-Villar, 2009. "Does cartel leadership facilitate collusion?," DEA Working Papers 39, Universitat de les Illes Balears, Departament d'Economía Aplicada.
  24. Reinhard Selten, 1973. "A Simple Model of Imperfect Competition, where 4 are Few and 6 are Many," Center for Mathematical Economics Working Papers 008, Center for Mathematical Economics, Bielefeld University.
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