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Horizontal mergers and successive oligopoly

This paper considers a successive oligopoly setting in which a set of upstream firms sell output non-exclusively to a group of downstream firms using a linear tariff. If the concavity of retail demand is constant then the profitability of horizontal merger at either the upstream or the downstream stage is shown to depend on the number of firms in the stage experiencing the merger and not on the number of firms in the other stage. Furthermore, the profitability of merger at either stage is the same as the profitability of merger amongst a set of vertically integrated firms in a setting in which all firms are vertically integrated. Finally, mergers at either stage are shown to reduce the sum of producer and consumer surplus. Moreover the negative effects of merger on surplus are unambiguously increased by increases in concentration in the merging stage and ambiguously affected by increases in concentration in the non-merging stage.

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File URL: http://www.wlu.ca/documents/6984/mersucol.pdf
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Paper provided by Wilfrid Laurier University, Department of Economics in its series Working Papers with number eg0041.

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Date of creation: 2005
Date of revision: 2005
Handle: RePEc:wlu:wpaper:eg0041
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  1. Farrell, Joseph & Shapiro, Carl, 1988. "Horizontal Mergers: An Equilibrium Analysis," Department of Economics, Working Paper Series qt0tp305nx, Department of Economics, Institute for Business and Economic Research, UC Berkeley.
  2. McAfee, R Preston & Williams, Michael A, 1992. "Horizontal Mergers and Antitrust Policy," Journal of Industrial Economics, Wiley Blackwell, vol. 40(2), pages 181-87, June.
  3. Ziss, Steffen, 2001. "Horizontal mergers and delegation," International Journal of Industrial Organization, Elsevier, vol. 19(3-4), pages 471-492, March.
  4. Horn, H. & Wolinsky, A., 1988. "Bilateral Monopolies And Incentives For Merger," Papers 410, Stockholm - International Economic Studies.
  5. 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 658-65, June.
  6. Salant, Stephen W & Switzer, Sheldon & Reynolds, Robert J, 1983. "Losses from Horizontal Merger: The Effects of an Exogenous Change in Industry Structure on Cournot-Nash Equilibrium," The Quarterly Journal of Economics, MIT Press, vol. 98(2), pages 185-99, May.
  7. Dobson, Paul W & Waterson, Michael, 1997. "Countervailing Power and Consumer Prices," Economic Journal, Royal Economic Society, vol. 107(441), pages 418-30, March.
  8. Morton I. Kamien & Israel Zang, 1987. "The Limits of Monopolization Through Acquisition," Discussion Papers 754, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  9. Javier M. López Cuñat & Miguel González-Maestre, 1999. "- Delegation And Mergers In Oligopoly," Working Papers. Serie AD 1999-03, Instituto Valenciano de Investigaciones Económicas, S.A. (Ivie).
  10. Perry, Martin K & Porter, Robert H, 1985. "Oligopoly and the Incentive for Horizontal Merger," American Economic Review, American Economic Association, vol. 75(1), pages 219-27, March.
  11. Neil Wrigley, 2001. "The consolidation wave in U.S. food retailing: A European perspective," Agribusiness, John Wiley & Sons, Ltd., vol. 17(4), pages 489-513.
  12. Greenhut, M L & Ohta, H, 1976. "Related Market Conditions and Interindustrial Mergers," American Economic Review, American Economic Association, vol. 66(3), pages 267-77, June.
  13. Waterson, Michael, 1980. "Price-Cost Margins and Successive Market Power," The Quarterly Journal of Economics, MIT Press, vol. 94(1), pages 135-50, February.
  14. Cheung, Francis K., 1992. "Two remarks on the equilibrium analysis of horizontal merger," Economics Letters, Elsevier, vol. 40(1), pages 119-123, September.
  15. Daughety, Andrew F, 1990. "Beneficial Concentration," American Economic Review, American Economic Association, vol. 80(5), pages 1231-37, December.
  16. Paul Dobson & Michael Waterson, 1999. "Retailer power: recent developments and policy implications," Economic Policy, CEPR;CES;MSH, vol. 14(28), pages 133-164, 04.
  17. Seade, Jesus K, 1980. "On the Effects of Entry," Econometrica, Econometric Society, vol. 48(2), pages 479-89, March.
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