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Product Differentiation and the Gains from Trade under Bertrand Duopoly

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  • Collie, David R

    (Cardiff Business School)

  • Roger Clarke

Abstract

In the literature on the welfare effects of free trade under imperfect competition, one important case seems to have been overlooked and that is the Bertrand duopoly model with differentiated products. Although many authors have analysed the welfare effects of free trade under Cournot duopoly, and demonstrated the possibility of losses from trade, there has been no thorough analysis of the welfare effects of free trade under Bertrand duopoly. This paper presents a thorough analysis of the welfare effects of free trade under Bertrand duopoly with differentiated products, and it is shown that there are always gains from trade.

Suggested Citation

  • Collie, David R & Roger Clarke, 2003. "Product Differentiation and the Gains from Trade under Bertrand Duopoly," Royal Economic Society Annual Conference 2003 47, Royal Economic Society.
    • Handle: RePEc:ecj:ac2003:47
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    References listed on IDEAS

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    1. Brander, James & Krugman, Paul, 1983. "A 'reciprocal dumping' model of international trade," Journal of International Economics, Elsevier, vol. 15(3-4), pages 313-321, November.
    2. David R. Collie, 1996. "Gains and losses from unilateral free trade under oligopoly," Discussion Papers (REL - Recherches Economiques de Louvain) 1996024, Université catholique de Louvain, Institut de Recherches Economiques et Sociales (IRES).
    3. T. Cordella, 1990. "Trade Liberalizaiton and Oligopolistic Industries: a Welfare Appraisal," Working Papers 100, Dipartimento Scienze Economiche, Universita' di Bologna.
    4. Daniel M. Bernhofen, 2001. "Product differentiation, competition, and international trade," Canadian Journal of Economics/Revue canadienne d'économique, John Wiley & Sons, vol. 34(4), pages 1010-1023, November.
    5. Anderson, Simon P & Donsimoni, M-P & Gabszewicz, J J, 1989. "Is International Trade Profitable to Oligopolistic Industries?," International Economic Review, Department of Economics, University of Pennsylvania and Osaka University Institute of Social and Economic Research Association, vol. 30(4), pages 725-733, November.
    6. Vives, Xavier, 1985. "On the efficiency of Bertrand and Cournot equilibria with product differentation," Journal of Economic Theory, Elsevier, vol. 36(1), pages 166-175, June.
    7. Daniel M. Bernhofen, 2001. "Product differentiation, competition, and international trade," Canadian Journal of Economics, Canadian Economics Association, vol. 34(4), pages 1010-1023, November.
    8. James R. MARKUSEN, 2021. "Trade And The Gains From Trade With Imperfect Competition," World Scientific Book Chapters, in: BROADENING TRADE THEORY Incorporating Market Realities into Traditional Models, chapter 14, pages 303-323, World Scientific Publishing Co. Pte. Ltd..
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    More about this item

    Keywords

    gains from trade; Bertrand Oligopoly;

    JEL classification:

    • F12 - International Economics - - Trade - - - Models of Trade with Imperfect Competition and Scale Economies; Fragmentation

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