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Welfare Enhancing Mergers Under Product Differentiation


  • Tina Kao


  • Flavio Menezes


This paper considers a model of duopoly with differentiated products to examine the welfare effects of a merger between two asymmetric firms. We find that for quantity competition, the parameter range for welfare enhancing merger widens if the products are closer substitutes. On the other hand, mergers are never welfare enhancing in this setting when firms compete in prices.

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  • Tina Kao & Flavio Menezes, 2009. "Welfare Enhancing Mergers Under Product Differentiation," ANU Working Papers in Economics and Econometrics 2009-508, Australian National University, College of Business and Economics, School of Economics.
  • Handle: RePEc:acb:cbeeco:2009-508

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    References listed on IDEAS

    1. Motta,Massimo, 2004. "Competition Policy," Cambridge Books, Cambridge University Press, number 9780521016919, March.
    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. David Hennessy, 2000. "Cournot Oligopoly Conditions under which Any Horizontal Merger Is Profitable," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 17(3), pages 277-284, November.
    4. 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.
    5. Piercarlo Zanchettin, 2006. "Differentiated Duopoly with Asymmetric Costs," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 15(4), pages 999-1015, December.
    6. 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.
    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.
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    Cited by:

    1. Apostolis Pavlou, 2015. "Learning by doing and horizontal mergers," Journal of Economics, Springer, vol. 116(1), pages 25-38, September.
    2. Nisvan Erkal & Daniel Piccinin, 2010. "Welfare-Reducing Mergers in Differentiated Oligopolies with Free Entry," The Economic Record, The Economic Society of Australia, vol. 86(273), pages 178-184, June.
    3. Fikru, Mahelet G. & Gautier, Luis, 2016. "Mergers in Cournot markets with environmental externality and product differentiation," Resource and Energy Economics, Elsevier, vol. 45(C), pages 65-79.
    4. Fikru, Mahelet G., 2016. "Modelling mergers among polluting firms when environmental policy is endogenous," Economic Analysis and Policy, Elsevier, vol. 49(C), pages 1-6.
    5. Mahelet G. Fikru & Matt Insall, 2016. "Is it more profitable to acquire cleaner or dirtier firms?," Environmental Economics and Policy Studies, Springer;Society for Environmental Economics and Policy Studies - SEEPS, vol. 18(4), pages 443-457, October.

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    JEL classification:

    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms
    • L12 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Monopoly; Monopolization Strategies

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