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International Trade Policy towards Monopoly and Oligopoly


  • Praveen Kujal

    () (Universidad Carlos III de Madrid)

  • Juan Ruiz

    () (Banco de España)


This paper highlights the importance of product differentiation and endogenous R&D in determining the optimal R&D policy, in a model where investment in cost reducing R&D is committed before firms compete in a differentiated-goods third-country export market. R&D is always taxed in oligopolies for high degrees of product differentiation. For lower degrees of product differentiation the duopoly is subsidized or the government remains inactive. In contrast, the monopoly is always subsidized. The government with a duopoly may be active or inactive depending on the degree of product differentiation. Thus, we may observe a reversal in the sign of the optimal R&D policy if the degree of product differentiation changes or, alternatively, if there is a change in the number of firms. Similar qualitative results hold if trade policy uses output subsidies, instead of R&D promotion.

Suggested Citation

  • Praveen Kujal & Juan Ruiz, 2009. "International Trade Policy towards Monopoly and Oligopoly," Working Papers 0901, Banco de España;Working Papers Homepage.
  • Handle: RePEc:bde:wpaper:0901

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    References listed on IDEAS

    1. Dixit, Avinash, 1984. "International Trade Policy for Oligopolistic Industries," Economic Journal, Royal Economic Society, vol. 94(376a), pages 1-16, Supplemen.
    2. Herguera, Inigo & Kujal, Praveen & Petrakis, Emmanuel, 2002. "Tariffs, quality reversals and exit in vertically differentiated industries," Journal of International Economics, Elsevier, vol. 58(2), pages 467-492, December.
    3. Brander, James A., 1995. "Strategic trade policy," Handbook of International Economics,in: G. M. Grossman & K. Rogoff (ed.), Handbook of International Economics, edition 1, volume 3, chapter 27, pages 1395-1455 Elsevier.
    4. Barbara J. Spencer & James A. Brander, 1983. "International R & D Rivalry and Industrial Strategy," Review of Economic Studies, Oxford University Press, vol. 50(4), pages 707-722.
    5. Brander, James A. & Spencer, Barbara J., 1985. "Export subsidies and international market share rivalry," Journal of International Economics, Elsevier, vol. 18(1-2), pages 83-100, February.
    6. Jonathan Eaton & Gene M. Grossman, 1986. "Optimal Trade and Industrial Policy Under Oligopoly," The Quarterly Journal of Economics, Oxford University Press, vol. 101(2), pages 383-406.
    7. Herguera, Inigo & Kujal, Praveen & Petrakis, Emmanuel, 2000. "Quantity restrictions and endogenous quality choice," International Journal of Industrial Organization, Elsevier, vol. 18(8), pages 1259-1277, December.
    8. Jagdish Bhagwati & Arvind Panagariya & T. N. Srinivasan, 1998. "Lectures on International Trade, 2nd Edition," MIT Press Books, The MIT Press, edition 1, volume 1, number 0262522470, July.
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    Cited by:

    1. Takauchi, Kazuhiro, 2012. "International R&D Rivalry with a Shipping Firm," MPRA Paper 36843, University Library of Munich, Germany.
    2. Richard Gretz & Jannett Highfill & Robert Scott, 2012. "R&D subsidy games: a cost sharing approach vs. reward for performance," The Journal of Technology Transfer, Springer, vol. 37(4), pages 385-403, August.

    More about this item


    product differentiation; strategic trade policy; policy reversals; r&d subsidies; monopoly; duopoly;

    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
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets

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