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Trade and Domestic Policies under Monopolistic Competition

Author

Listed:
  • Alessia Campolmi
  • Harald Fadinger
  • Chiara Forlati

Abstract

Should trade agreements constrain domestic policies? We analyse this question using a model with monopolistic competition and constant-elasticity-of-substitution demand. We develop a welfare decomposition to show that welfare changes induced by trade and domestic policies can be decomposed into consumption and production efficiencies and terms-of-trade effects. We analyse the reasons to sign trade agreements and compare shallow and deep trade agreements, modelled according to GATT-WTO rules. Under monopolistic competition, unlike deep trade agreements, shallow agreements with market access commitments may not achieve efficiency because terms of trade can be improved without reducing market access by increasing the set of foreign firms selling domestically.

Suggested Citation

  • Alessia Campolmi & Harald Fadinger & Chiara Forlati, 2025. "Trade and Domestic Policies under Monopolistic Competition," The Economic Journal, Royal Economic Society, vol. 135(667), pages 892-913.
    • Handle: RePEc:oup:econjl:v:135:y:2025:i:667:p:892-913.
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    File URL: http://hdl.handle.net/10.1093/ej/ueae098
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    Cited by:

    1. is not listed on IDEAS
    2. Teodora Borota & Fabrice Defever & Giammario Impullitti, 2019. "Innovation union: Costs and benefits of innovation policy coordination," Discussion Papers 2019-14, University of Nottingham, GEP.
    3. Nocco, Antonella & Ottaviano, Gianmarco I.P. & Salto, Matteo, 2019. "Geography, competition, and optimal multilateral trade policy," Journal of International Economics, Elsevier, vol. 120(C), pages 145-161.
    4. Gene M Grossman & Elhanan Helpman, 2021. "When Tariffs Disrupt Global Supply Chains," Working Papers 274, Princeton University, Department of Economics, Center for Economic Policy Studies..
    5. Atsushi Tadokoro, 2020. "Tariff policies, variable markups, and within-sector missallocation," Discussion Papers in Economics and Business 20-16, Osaka University, Graduate School of Economics.
    6. Gene M. Grossman & Phillip McCalman & Robert W. Staiger, 2021. "The “New” Economics of Trade Agreements: From Trade Liberalization to Regulatory Convergence?," Econometrica, Econometric Society, vol. 89(1), pages 215-249, January.
    7. Arnaud Costinot & Andrés Rodríguez‐Clare & Iván Werning, 2020. "Micro to Macro: Optimal Trade Policy With Firm Heterogeneity," Econometrica, Econometric Society, vol. 88(6), pages 2739-2776, November.
    8. Luca Macedoni & Ariel Weinberger, 2021. "Quality Misallocation, Trade, and Regulations," CESifo Working Paper Series 9041, CESifo.

    More about this item

    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
    • F42 - International Economics - - Macroeconomic Aspects of International Trade and Finance - - - International Policy Coordination and Transmission

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