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Losses From Trade In Krugman’s Model: Almost Impossible

Author

Listed:
  • Igor A. Bykadorov

    (National Research University Higher School of Economics)

  • Alexey A. Gorn

    (Bocconi University)

  • Sergey G. Kokovin

    (National Research University Higher School of Economics)

  • Evgeny V. Zhelobodko

Abstract

Studying the standard monopolistic competition model with unspecified utility/cost functions, we find necessary and sufficient conditions on the function elasticities, when an expanding market or trade incur welfare losses. Two numerical examples explain why: either excessive or insufficient entry of firms is aggravated by market growth. The variable marginal cost enforces the harmful effect. Still harm looks practically improbable.

Suggested Citation

  • Igor A. Bykadorov & Alexey A. Gorn & Sergey G. Kokovin & Evgeny V. Zhelobodko, 2014. "Losses From Trade In Krugman’s Model: Almost Impossible," HSE Working papers WP BRP 61/EC/2014, National Research University Higher School of Economics.
    • Handle: RePEc:hig:wpaper:61/ec/2014
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    References listed on IDEAS

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    5. Evgeny Zhelobodko & Sergey Kokovin & Mathieu Parenti & Jacques-François Thisse, 2011. "Monopolistic competition in general equilibrium: Beyond the CES," PSE Working Papers halshs-00566431, HAL.
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    11. Costas Arkolakis & Arnaud Costinot & Andres Rodriguez-Clare, 2012. "New Trade Models, Same Old Gains?," American Economic Review, American Economic Association, vol. 102(1), pages 94-130, February.
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    Cited by:

    1. Swati Dhingra & John Morrow, 2019. "Monopolistic Competition and Optimum Product Diversity under Firm Heterogeneity," Journal of Political Economy, University of Chicago Press, vol. 127(1), pages 196-232.
    2. Bykadorov, Igor & Gorn, Alexey & Kokovin, Sergey & Zhelobodko, Evgeny, 2015. "Why are losses from trade unlikely?," Economics Letters, Elsevier, vol. 129(C), pages 35-38.

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    More about this item

    Keywords

    Market distortions; Trade gains; Variable markups; Demand elasticity.;
    All these keywords.

    JEL classification:

    • F12 - International Economics - - Trade - - - Models of Trade with Imperfect Competition and Scale Economies; Fragmentation
    • L13 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Oligopoly and Other Imperfect Markets

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