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Decomposing the Welfare Gains from Trade

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  • Paolo Bertoletti
  • Federico Etro

Abstract

The textbook of international economics by Krugman, Obstfeld and Melitz (2022) introduces the gains from trade under monopolistic competition with a simple linear demand model. We use its representative consumer foundation to decompose the welfare gains from a market expansion into competitive effects, variety effects and selection effects.

Suggested Citation

  • Paolo Bertoletti & Federico Etro, 2024. "Decomposing the Welfare Gains from Trade," Working Papers - Economics wp2024_22.rdf, Universita' degli Studi di Firenze, Dipartimento di Scienze per l'Economia e l'Impresa.
    • Handle: RePEc:frz:wpaper:wp2024_22.rdf
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    References listed on IDEAS

    as
    1. Steven C. Salop, 1979. "Monopolistic Competition with Outside Goods," Bell Journal of Economics, The RAND Corporation, vol. 10(1), pages 141-156, Spring.
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    More about this item

    Keywords

    Gains from trade; Monopolistic competition; Heterogeneous firms;
    All these keywords.

    JEL classification:

    • D11 - Microeconomics - - Household Behavior - - - Consumer Economics: Theory
    • D43 - Microeconomics - - Market Structure, Pricing, and Design - - - Oligopoly and Other Forms of Market Imperfection
    • F12 - International Economics - - Trade - - - Models of Trade with Imperfect Competition and Scale Economies; Fragmentation

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