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New trade models, elusive welfare gains

Author

Listed:
  • Kristian Behrens

    (Department of Economics, Université du Québec à Montréal)

  • Yoshitsugu Kanemoto

    (National Graduate Institute for Policy Studies)

  • Yasusada Murata

    (Nihon University)

Abstract

We generalize the formulae for welfare changes by Arkolakis, Costinot, and Rodríguez-Clare (2012) and Melitz and Redding (2014a) to allow for various cardinalizations of the subutility functions for varieties. Despite the same macro restrictions and the same equilibrium allocations, our new formula coincides with the original ones if and only if the number of varieties is invariant to foreign shocks. When product diversity responds to foreign shocks, different cardinalizations generate different welfare changes, thus revealing a fundamental difficulty in quantifying welfare gains implied by new trade models.

Suggested Citation

  • Kristian Behrens & Yoshitsugu Kanemoto & Yasusada Murata, 2014. "New trade models, elusive welfare gains," GRIPS Discussion Papers 14-20, National Graduate Institute for Policy Studies.
    • Handle: RePEc:ngi:dpaper:14-20
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    References listed on IDEAS

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    1. Christian Broda & David E. Weinstein, 2006. "Globalization and the Gains From Variety," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 121(2), pages 541-585.
    2. Feenstra, Robert C, 1994. "New Product Varieties and the Measurement of International Prices," American Economic Review, American Economic Association, vol. 84(1), pages 157-177, March.
    3. Behrens, Kristian & Kanemoto, Yoshitsugu & Murata, Yasusada, 2015. "The Henry George Theorem in a second-best world," Journal of Urban Economics, Elsevier, vol. 85(C), pages 34-51.
    4. Marc J. Melitz, 2003. "The Impact of Trade on Intra-Industry Reallocations and Aggregate Industry Productivity," Econometrica, Econometric Society, vol. 71(6), pages 1695-1725, November.
    5. Demidova, Svetlana & Rodríguez-Clare, Andrés, 2013. "The simple analytics of the Melitz model in a small economy," Journal of International Economics, Elsevier, vol. 90(2), pages 266-272.
    6. 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. Igor Bykadorov & Andrea Ellero & Stefania Funari & Sergey Kokovin & Pavel Molchanov, 2016. "Painful Birth of Trade Under Classical Monopolistic Competition," HSE Working papers WP BRP 132/EC/2016, National Research University Higher School of Economics.
    2. Redding, Stephen J. & Weinstein, David E., 2016. "A unified approach to estimating demand and welfare," LSE Research Online Documents on Economics 67681, London School of Economics and Political Science, LSE Library.
    3. Marco Bee & Stefano Schiavo, 2018. "Powerless: gains from trade when firm productivity is not Pareto distributed," Review of World Economics (Weltwirtschaftliches Archiv), Springer;Institut für Weltwirtschaft (Kiel Institute for the World Economy), vol. 154(1), pages 15-45, February.
    4. Stephen J Redding & David E Weinstein, 2020. "Measuring Aggregate Price Indices with Taste Shocks: Theory and Evidence for CES Preferences," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 135(1), pages 503-560.

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    More about this item

    JEL classification:

    • F11 - International Economics - - Trade - - - Neoclassical Models of Trade
    • F12 - International Economics - - Trade - - - Models of Trade with Imperfect Competition and Scale Economies; Fragmentation

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