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Product Differentiation, the Volume of Trade and Profits under Cournot and Bertrand Duopoly

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This paper analyses how product differentiation affects the volume of trade under duopoly using Shubik-Levitan demand functions rather than the Bowley demand functions used by Bernhofen (2001). The Shubik-Levitan demand functions have the advantage that an increase in product differentiation does not increase the size of the market as happens with the Bowley demand functions. It is shown that the volume of trade in terms of quantities is decreasing in the degree of product differentiation when the trade cost is relatively low, but increasing in the degree of product differentiation when the trade cost is relatively high.

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  • Collie, David R. & Le, Vo Phuong Mai, 2011. "Product Differentiation, the Volume of Trade and Profits under Cournot and Bertrand Duopoly," Cardiff Economics Working Papers E2011/26, Cardiff University, Cardiff Business School, Economics Section.
  • Handle: RePEc:cdf:wpaper:2011/26
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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. Roger Clarke & David Collie, 2003. "Product differentiation and the gains from trade under Bertrand duopoly," Canadian Journal of Economics, Canadian Economics Association, vol. 36(3), pages 658-673, August.
    3. Leahy, Dermot & Neary, J Peter, 2010. "Oligopoly and Trade," CEPR Discussion Papers 8172, C.E.P.R. Discussion Papers.
    4. 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.
    5. Daniel M. Bernhofen, 2001. "Product differentiation, competition, and international trade," Canadian Journal of Economics, Canadian Economics Association, vol. 34(4), pages 1010-1023, November.
    6. Nirvikar Singh & Xavier Vives, 1984. "Price and Quantity Competition in a Differentiated Duopoly," RAND Journal of Economics, The RAND Corporation, vol. 15(4), pages 546-554, Winter.
    7. Schmitt, Nicolas & Yu, Zhihao, 2001. "Economies of scale and the volume of intra-industry trade," Economics Letters, Elsevier, vol. 74(1), pages 127-132, December.
    8. Brander, James A., 1981. "Intra-industry trade in identical commodities," Journal of International Economics, Elsevier, vol. 11(1), pages 1-14, February.
    9. Ethier, Wilfred J, 1982. "National and International Returns to Scale in the Modern Theory of International Trade," American Economic Review, American Economic Association, vol. 72(3), pages 389-405, June.
    10. Piercarlo Zanchettin, 2006. "Differentiated Duopoly with Asymmetric Costs," Journal of Economics & Management Strategy, Wiley Blackwell, vol. 15(4), pages 999-1015, December.
    11. Harrigan, James, 1994. "Scale Economies and the Volume of Trade," The Review of Economics and Statistics, MIT Press, vol. 76(2), pages 321-328, May.
    12. 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.
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    Cited by:

    1. Leahy, Dermot & Neary, J Peter, 2020. "When the Threat is Stronger than the Execution: Trade and Welfare under Oligopoly," CEPR Discussion Papers 15112, C.E.P.R. Discussion Papers.
    2. Fan, Cuihong & Jun, Byoung Heon & Wolfstetter, Elmar G., 2016. "Optimal bid disclosure in patent license auctions under alternative modes of competition," International Journal of Industrial Organization, Elsevier, vol. 47(C), pages 1-32.
    3. Peter Neary & Dermot Leahy, 2015. "When The Threat Is Stronger Than The Execution: Trade Liberalization And Welfare Under Oligopoly," Economics Series Working Papers 775, University of Oxford, Department of Economics.
    4. Arozamena, Leandro & Weinschelbaum, Federico & Wolfstetter, Elmar G., 2018. "Procuring substitutes with (fine-tuned) first-price auctions," Economics Letters, Elsevier, vol. 171(C), pages 115-118.

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    More about this item

    Keywords

    Product Differentiation; Cournot Oligopoly; Bertrand Oligopoly;
    All these keywords.

    JEL classification:

    • F12 - International Economics - - Trade - - - Models of Trade with Imperfect Competition and Scale Economies; Fragmentation
    • F13 - International Economics - - Trade - - - Trade Policy; International Trade Organizations

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