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Market Efficiency and Coalition Structures

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  • David Bartolini

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Abstract

We consider a three-stage game in which symmetric firms decide whether to invest in a cost-reducing technology, then they have the possibility to merge (forming coalitions), and eventually, in the third stage, a Cournot oligopoly game is played by the resulting firms (coalitions). We show that, contrary to the existing literature, the monopoly market structure may fail to form even when the number of initial firms is just three. We then introduce a weighted sharing rule and show that a situation in which all firms acquire the cost-reducing asset cannot be sustained as a Subgame Perfect Equilibrium.

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Paper provided by University of Essex, Department of Economics in its series Economics Discussion Papers with number 628.

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Date of creation: 28 Mar 2007
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Handle: RePEc:esx:essedp:628

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  1. Paz Espinosa, Maria & Macho-Stadler, Ines, 2003. "Endogenous formation of competing partnerships with moral hazard," Games and Economic Behavior, Elsevier, vol. 44(1), pages 183-194, July.
  2. Bloch, Francis, 1996. "Sequential Formation of Coalitions in Games with Externalities and Fixed Payoff Division," Games and Economic Behavior, Elsevier, vol. 14(1), pages 90-123, May.
  3. Ray, D. & Vohra, R., 1993. "Equilibrium Binding Agreements," Papers 21, Boston University - Department of Economics.
  4. Motta,Massimo, 2004. "Competition Policy," Cambridge Books, Cambridge University Press, number 9780521016919.
  5. Yi, Sang-Seung, 1997. "Stable Coalition Structures with Externalities," Games and Economic Behavior, Elsevier, vol. 20(2), pages 201-237, August.
  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 219-27, March.
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