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Market Efficiency and Coalition Structures

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  • Bartolini, David

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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  • Bartolini, David, 2007. "Market Efficiency and Coalition Structures," Economics Discussion Papers 8910, University of Essex, Department of Economics.
    • Handle: RePEc:esx:essedp:8910
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    References listed on IDEAS

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    1. Ray, Debraj & Vohra, Rajiv, 1997. "Equilibrium Binding Agreements," Journal of Economic Theory, Elsevier, vol. 73(1), pages 30-78, March.
    2. Carlo Carraro (ed.), 2003. "The Endogenous Formation of Economic Coalitions," Books, Edward Elgar Publishing, number 2999.
    3. 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.
    4. 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.
    5. 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.
    6. 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.
    7. Yi, Sang-Seung, 1997. "Stable Coalition Structures with Externalities," Games and Economic Behavior, Elsevier, vol. 20(2), pages 201-237, August.
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