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Aggregation with Cournot competition: the Le Chatelier Samuelson principle

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  • Koebel, Bertrand
  • François, Laisney

Abstract

This paper studies the aggregate substitution and expansion effects triggered by changes in input prices in a context where firms supply a homogeneous commodity and compete in quantities à la Cournot. We derive a sufficient condition for the existence of a Cournot equilibrium and show that this condition also ensures that the Le Chatelier-Samuelson principle is satisfied in the aggregate at the Cournot equilibrium, although it may not be satisfied at the firm level.

Suggested Citation

  • Koebel, Bertrand & François, Laisney, 2014. "Aggregation with Cournot competition: the Le Chatelier Samuelson principle," MPRA Paper 60476, University Library of Munich, Germany.
    • Handle: RePEc:pra:mprapa:60476
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    References listed on IDEAS

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    1. William Novshek, 1985. "On the Existence of Cournot Equilibrium," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 52(1), pages 85-98.
    2. Szidarovszky, F & Yakowitz, S, 1977. "A New Proof of the Existence and Uniqueness of the Cournot Equilibrium," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 18(3), pages 787-789, October.
    3. Heiner, Ronald A, 1982. "Theory of the Firm in "Short-Run" Industry Equilibrium," American Economic Review, American Economic Association, vol. 72(3), pages 555-562, June.
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    5. Sakai, Yasuhiro, 1973. "An Axiomatic Approach to Input Demand Theory," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 14(3), pages 735-752, October.
    6. Eichhorn, Wolfgang & Oettli, Werner, 1972. "A General Formulation of the Lechatelier-Samuelson Principle," Econometrica, Econometric Society, vol. 40(4), pages 711-717, July.
    7. Bertrand Koebel & François Laisney, 2016. "Aggregation with Cournot Competition: An Empirical Investigation," Annals of Economics and Statistics, GENES, issue 121-122, pages 91-119.
    8. Koebel, Bertrand M. & Laisney, François, 2010. "The aggregate Le Chatelier Samuelson principle with Cournot competition," ZEW Discussion Papers 10-009, ZEW - Leibniz Centre for European Economic Research.
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    Cited by:

    1. Alexandrov, Alexei & Bedre-Defolie, Özlem, 2017. "LeChatelier–Samuelson principle in games and pass-through of shocks," Journal of Economic Theory, Elsevier, vol. 168(C), pages 44-54.
    2. Bertrand Koebel & François Laisney, 2016. "Aggregation with Cournot Competition: An Empirical Investigation," Annals of Economics and Statistics, GENES, issue 121-122, pages 91-119.

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    More about this item

    Keywords

    Aggregation; returns to scale; market power; markup; own-price elasticity.;
    All these keywords.

    JEL classification:

    • D21 - Microeconomics - - Production and Organizations - - - Firm Behavior: Theory
    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection

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