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Simulated economic impacts in applied trade modelling: A comparison of tariff aggregation approaches

Author

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  • Himics, Mihaly
  • Listorti, Giulia
  • Tonini, Axel
Abstract
This paper assesses the performance of two recently developed tariff aggregators in reducing tariff aggregation bias by analysing Swiss beef market liberalisation scenarios. Specific relevant sources of bias are addressed: substitution effects on import demand, Tariff Rate Quotas and overprotection in tariffs. The aggregators are linked to a global large-scale partial equilibrium model and benchmarked against a standard aggregator. The choice of the aggregation method shows considerable effects on simulated economic impacts, specifically if the dispersion in tariffs or tariff cuts is large. A large bias is revealed in simulated gains from trade liberalisation using the standard aggregator. The impacts on traded quantities are found to be overestimated, while price and welfare effects can be higher or lower by switching to alternative aggregation methods. By reducing aggregation bias and depicting negotiated tariff schedules more directly, the proposed aggregators enhance the contribution of trade modelling to evidence-based policy making.

Suggested Citation

  • Himics, Mihaly & Listorti, Giulia & Tonini, Axel, 2020. "Simulated economic impacts in applied trade modelling: A comparison of tariff aggregation approaches," Economic Modelling, Elsevier, vol. 87(C), pages 344-357.
    • Handle: RePEc:eee:ecmode:v:87:y:2020:i:c:p:344-357
    DOI: 10.1016/j.econmod.2019.08.007
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    3. Jafari, Yaghoob & Britz, Wolfgang & Guimbard, Houssein & Beckman, Jayson, 2021. "Properly capturing tariff rate quotas for trade policy analysis in computable general equilibrium models," Economic Modelling, Elsevier, vol. 104(C).
    4. Cai, Yongxia & Woollacott, Jared & Beach, Robert H. & Rafelski, Lauren E. & Ramig, Christopher & Shelby, Michael, 2023. "Insights from adding transportation sector detail into an economy-wide model: The case of the ADAGE CGE model," Energy Economics, Elsevier, vol. 123(C).
    5. Yaghoob Jafari & Mihaly Himics & Wolfgang Britz & Jayson Beckman, 2021. "It is all in the details: A bilateral approach for modelling trade agreements at the tariff line," Canadian Journal of Agricultural Economics/Revue canadienne d'agroeconomie, Canadian Agricultural Economics Society/Societe canadienne d'agroeconomie, vol. 69(3), pages 415-442, September.

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    More about this item

    Keywords

    Trade policy simulation; Tariff aggregation; Aggregation bias; Quota rent; Tariff rate quotas;
    All these keywords.

    JEL classification:

    • Q17 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agriculture in International Trade
    • Q18 - Agricultural and Natural Resource Economics; Environmental and Ecological Economics - - Agriculture - - - Agricultural Policy; Food Policy; Animal Welfare Policy
    • F13 - International Economics - - Trade - - - Trade Policy; International Trade Organizations
    • F14 - International Economics - - Trade - - - Empirical Studies of Trade

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