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Multiproduct duopolists

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  • CHAMPSAUR, Paul
  • ROCHET, Jean-Charles

Abstract

The authors study a differentiated industry in which two firms compete by offering intervals of qualities to heterogenous consumers. They establish conditions which, for perfect competition and monopoly, imply that different consumers choose different qualities. Under these conditions, they show existence and essential uniqueness of a price equilibrium. At all price equilibria in which both firms make a positive profit, discrimination of consumers is incomplete. The authors also discuss the choice of product lines, and show that the Chamberlinian incentive to differentiate its products from those of its competitor dominates for intermediate qualities. Copyright 1989 by The Econometric Society.
(This abstract was borrowed from another version of this item.)

Suggested Citation

  • CHAMPSAUR, Paul & ROCHET, Jean-Charles, 1989. "Multiproduct duopolists," LIDAM Reprints CORE 854, Université catholique de Louvain, Center for Operations Research and Econometrics (CORE).
  • Handle: RePEc:cor:louvrp:854
    Note: In : Econometrica, 57(1), 533-557, 1989
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