COMPETITION FOR MARKET SHARE OR FOR MARKET SIZE: OLIGOPOLISTIC EQUILIBRIA WITH VARYING COMPETITIVE TOUGHNESS

Claude d'Aspremont, Rodolphe Dos Santos Ferreira and Louis-André Gérard-Varet

International Economic Review, 2007, vol. 48, issue 3, 761-784

Abstract: For an industry producing a composite commodity, we propose a comprehensive concept of oligopolistic equilibrium, allowing for a parameterized continuum of regimes varying in competitive toughness. Each firm sets simultaneously its price and its quantity under two constraints, relative to its market share and to market size. The price and the quantity equilibrium outcomes always belong to the set of oligopolistic equilibria. When firms are identical and we let their number increase, any sequence of symmetric oligopolistic equilibria converges to the monopolistic competition outcome. Further results are derived in the symmetric CES case, concerning in particular the collusive solution enforceability. Copyright 2007 by the Economics Department Of The University Of Pennsylvania And Osaka University Institute Of Social And Economic Research Association.

Date: 2007
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Working Paper: Competition for market share or for market size: oligopolistic equilibria with varying competitive toughness (2007)
Working Paper: Competition for market share or for market size: Oligopolistic equilibria with varying competitive toughness (2004)
Working Paper: Competition for market share or for market size: oligopolistic equilibria with varying competitive toughness (2003)
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