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Mergers and Dynamic Oligopoly

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  • Kwang Soo Cheong
  • Kenneth L Judd

Abstract

Static oligopoly theories disagree on whether mergers are profitable. The Cournot model says that many potential mergers would be unprofitable whereas the Bertrand model says that all mergers are profitable. We show that, for economically sensible parameter values, mergers are profitable for merging firms when firms choose both price and output, using inventories to absorb differences between output and sales. Furthermore, substantial cost advantages are necessary for a merger to benefit consumers. The merger predictions of our dynamic model are most similarto predictions of static Bertrand analyses of differentiated products even though our model often behaves like the Cournot model in the long run.

Suggested Citation

  • Kwang Soo Cheong & Kenneth L Judd, 1997. "Mergers and Dynamic Oligopoly," Working Papers 199714, University of Hawaii at Manoa, Department of Economics.
  • Handle: RePEc:hai:wpaper:199714
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    File URL: http://www.economics.hawaii.edu/research/workingpapers/88-98/WP_97-14.pdf
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    References listed on IDEAS

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    1. Farrell, Joseph & Shapiro, Carl, 1990. "Horizontal Mergers: An Equilibrium Analysis," American Economic Review, American Economic Association, pages 107-126.
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    3. Kirman, Alan P & Sobel, Matthew J, 1974. "Dynamic Oligopoly with Inventories," Econometrica, Econometric Society, vol. 42(2), pages 279-287, March.
    4. 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.
    5. Bulow, Jeremy I & Geanakoplos, John D & Klemperer, Paul D, 1985. "Multimarket Oligopoly: Strategic Substitutes and Complements," Journal of Political Economy, University of Chicago Press, vol. 93(3), pages 488-511, June.
    6. 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.
    7. Froeb, Luke M. & Werden, Gregory J., 1998. "A robust test for consumer welfare enhancing mergers among sellers of a homogeneous product," Economics Letters, Elsevier, vol. 58(3), pages 367-369, March.
    8. Appelbaum, Elie, 1982. "The estimation of the degree of oligopoly power," Journal of Econometrics, Elsevier, vol. 19(2-3), pages 287-299, August.
    9. Werden, Gregory J & Froeb, Luke M, 1998. "The Entry-Inducing Effects of Horizontal Mergers: An Exploratory Analysis," Journal of Industrial Economics, Wiley Blackwell, vol. 46(4), pages 525-543, December.
    10. Lommerud, Kjell Erik & Sorgard, Lars, 1997. "Merger and product range rivalry," International Journal of Industrial Organization, Elsevier, vol. 16(1), pages 21-42, November.
    11. Werden, Gregory J & Froeb, Luke M, 1994. "The Effects of Mergers in Differentiated Products Industries: Logit Demand and Merger Policy," Journal of Law, Economics, and Organization, Oxford University Press, vol. 10(2), pages 407-426, October.
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    13. Gaudet, Gerard & Salant, Stephen W, 1991. "Increasing the Profits of a Subset of Firms in Oligopoly Models with Strategic Substitutes," American Economic Review, American Economic Association, vol. 81(3), pages 658-665, June.
    14. Salop, Steven C, 1987. "Symposium on Mergers and Antitrust," Journal of Economic Perspectives, American Economic Association, vol. 1(2), pages 3-12, Fall.
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    Cited by:

    1. Gautam Gowrisankaran & Thomas J. Holmes, 2000. "Do mergers lead to monopoly in the long run? Results from the dominant firm model," Staff Report 264, Federal Reserve Bank of Minneapolis.
    2. Jiawei Chen, 2006. "The Effects of Mergers with Dynamic Capacity Accumulation," Working Papers 060701, University of California-Irvine, Department of Economics.
    3. Chen, Jiawei, 2009. "The effects of mergers with dynamic capacity accumulation," International Journal of Industrial Organization, Elsevier, vol. 27(1), pages 92-109, January.

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    Keywords

    oligopoly; dynamic games; mergers;

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