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Quality and Gravity in International Trade

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  • Lisandra Flach
  • Florian Unger

Abstract

This paper introduces quality innovations with endogenous sunk costs in a heterogeneous firm model of international trade and derives implications for the gravity equation. The model predicts that the effect of fixed costs on exports and on the share of exporters is lower in industries with a higher degree of vertical product differentiation. We use both aggregate trade data and firm-level data to estimate gravity equations and find strong evidence for a dampening effect of vertical differentiation on the fixed costs elasticity in international trade. Moreover, we estimate the parameters of our model and simulate the effects of a reduction in fixed trade barriers. Accounting for quality lowers the positive gains from trade and leads to more heterogeneous effects across industries compared to a trade model without quality investments. Consistent with our theory, vertical differentiation affects exports via sunk costs and the extensive margin, whereas the effect of variable trade costs does not depend on quality.

Suggested Citation

  • Lisandra Flach & Florian Unger, 2016. "Quality and Gravity in International Trade," CESifo Working Paper Series 6080, CESifo.
    • Handle: RePEc:ces:ceswps:_6080
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    3. Flach, Lisandra & Unger, Florian, 2022. "Quality and gravity in international trade," Journal of International Economics, Elsevier, vol. 137(C).
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    5. Jeffrey H. Bergstrand & Stephen R. Cray & Antoine Gervais, 2023. "Increasing Marginal Costs, Firm Heterogeneity,and the Gains from "Deep" International Trade Agreements," Cahiers de recherche 23-01, Departement d'économique de l'École de gestion à l'Université de Sherbrooke.
    6. Xianpu Xu & Yuchen Song, 2023. "Is There a Conflict between Automation and Environment? Implications of Artificial Intelligence for Carbon Emissions in China," Sustainability, MDPI, vol. 15(16), pages 1-22, August.
    7. Bergstrand, Jeffrey H. & Cray, Stephen R. & Gervais, Antoine, 2023. "Increasing marginal costs, firm heterogeneity, and the gains from “deep” international trade agreements," Journal of International Economics, Elsevier, vol. 144(C).
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    More about this item

    Keywords

    international trade; heterogeneous firms; gravity; product quality;
    All these keywords.

    JEL classification:

    • F12 - International Economics - - Trade - - - Models of Trade with Imperfect Competition and Scale Economies; Fragmentation
    • F14 - International Economics - - Trade - - - Empirical Studies of Trade
    • L11 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Production, Pricing, and Market Structure; Size Distribution of Firms

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