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Endogenous mergers under multi-market competition


  • Kao, Tina
  • Menezes, Flavio


This paper examines a simple model of strategic interactions among firms that face at least some of the same rivals in two related markets (for goods 1 and 2). It shows that when firms compete in quantity, market prices increase as the degree of multi-market contact increases. However, the welfare consequences of multi-market contact are more complex and depend on how two fundamental forces play out. The first is the selection effect, which acts to increase welfare, as shutting down the relatively more inefficient firm is beneficial. The second opposing effect is the internalisation of the Cournot externality effect; reducing the production of good 2 allows firms to sustain a higher price for good 1. This works to increase prices and, therefore, decrease consumer surplus (but increase producer surplus). These two effects are influenced by the degree of asymmetry between markets 1 and 2 and the degree of substitutability between goods 1 and 2.

Suggested Citation

  • Kao, Tina & Menezes, Flavio, 2009. "Endogenous mergers under multi-market competition," Journal of Mathematical Economics, Elsevier, vol. 45(12), pages 817-829, December.
  • Handle: RePEc:eee:mateco:v:45:y:2009:i:12:p:817-829

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    References listed on IDEAS

    1. Cheung, Francis K., 1992. "Two remarks on the equilibrium analysis of horizontal merger," Economics Letters, Elsevier, vol. 40(1), pages 119-123, September.
    2. Farrell, Joseph & Shapiro, Carl, 1990. "Horizontal Mergers: An Equilibrium Analysis," American Economic Review, American Economic Association, vol. 80(1), pages 107-126, March.
    3. Horn, Henrik & Persson, Lars, 2001. "Endogenous mergers in concentrated markets," International Journal of Industrial Organization, Elsevier, vol. 19(8), pages 1213-1244, September.
    4. Scott,John T., 2005. "Purposive Diversification and Economic Performance," Cambridge Books, Cambridge University Press, number 9780521022583, March.
    5. 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.
    6. Ramón Faulí-Oller, 1997. "On merger profitability in a cournot setting," Working Papers. Serie AD 1997-03, Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie).
    7. Perry, Martin K & Porter, Robert H, 1985. "Oligopoly and the Incentive for Horizontal Merger," American Economic Review, American Economic Association, vol. 75(1), pages 219-227, March.
    8. Juan Carlos Bárcena-Ruiz & María Begoña Garzón, 2003. "Mixed Duopoly, Merger and Multiproduct Firms," Journal of Economics, Springer, vol. 80(1), pages 27-42, August.
    9. Steven Pilloff, 1999. "Multimarket Contact in Banking," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 14(2), pages 163-182, March.
    10. Philip M. Parker & Lars-Hendrik Roller, 1997. "Collusive Conduct in Duopolies: Multimarket Contact and Cross-Ownership in the Mobile Telephone Industry," RAND Journal of Economics, The RAND Corporation, vol. 28(2), pages 304-322, Summer.
    11. Scott, John T, 1982. "Multimarket Contact and Economic Performance," The Review of Economics and Statistics, MIT Press, vol. 64(3), pages 368-375, August.
    12. William N. Evans & Ioannis N. Kessides, 1994. "Living by the "Golden Rule": Multimarket Contact in the U. S. Airline Industry," The Quarterly Journal of Economics, Oxford University Press, vol. 109(2), pages 341-366.
    13. Nirvikar Singh & Xavier Vives, 1984. "Price and Quantity Competition in a Differentiated Duopoly," RAND Journal of Economics, The RAND Corporation, vol. 15(4), pages 546-554, Winter.
    14. 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.
    15. Fauli-Oller, Ramon, 2002. "Mergers between Asymmetric Firms: Profitability and Welfare," Manchester School, University of Manchester, vol. 70(1), pages 77-87, January.
    16. Hackner, Jonas, 2000. "A Note on Price and Quantity Competition in Differentiated Oligopolies," Journal of Economic Theory, Elsevier, vol. 93(2), pages 233-239, August.
    17. Corwin D. Edwards, 1955. "Conglomerate Bigness as a Source of Power," NBER Chapters,in: Business Concentration and Price Policy, pages 331-359 National Bureau of Economic Research, Inc.
    18. Zhiqi Chen & Thomas Ross, 2007. "Markets Linked by Rising Marginal Costs: Implications for Multimarket Contact, Recoupment, and Retaliatory Entry," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 31(1), pages 1-21, August.
    19. Fauli-Oller, Ramon, 1997. "On merger profitability in a Cournot setting," Economics Letters, Elsevier, vol. 54(1), pages 75-79, January.
    20. Possajennikov, Alex, 2001. "Equilibrium selection in a merger game," Economics Letters, Elsevier, vol. 72(2), pages 255-261, August.
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    Cited by:

    1. X. Wang & Jingang Zhao, 2010. "Why are firms sometimes unwilling to reduce costs?," Journal of Economics, Springer, vol. 101(2), pages 103-124, October.
    2. Hou, Rui & Yang, Jianmei & Yao, Canzhong & McKelvey, Bill, 2015. "How does competition structure affect industry merger waves? A network analysis perspective," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 429(C), pages 140-156.

    More about this item


    Mergers Multi-market competition Cournot externality Cost efficiency;

    JEL classification:

    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets
    • L44 - Industrial Organization - - Antitrust Issues and Policies - - - Antitrust Policy and Public Enterprise, Nonprofit Institutions, and Professional Organizations


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