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Measuring the impacts of global trade reform with optimal aggregators of distortions:

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  • Laborde Debucquet, David
  • Martin, Will
  • van der Mensbrugghe, Dominique

Abstract

Traditional weighted-average measures of trade distortions are widely used in analyzing global and regional reforms, despite well-known deficiencies. This paper develops and applies optimal aggregators for the real-world case of multiple countries and commodities with much more detailed information on trade than on production and consumption. The approach reflects that different aggregators are needed for expenditure on imported goods and tariff revenues, and allows for incorporation of both intensive and extensive margins of adjustment to reform. Applications confirm that the technique is straightforward enough for widespread use, and point to close to a doubling of the welfare gains at the intensive margin when using the highest possible level of international commodity disaggregation, with larger gains in developing regions than in the industrial countries. The measured income gains increase along the entire path of liberalization, with slightly larger increases in the earlier stages, where the gaps between the responses of the expenditure and tariff revenue aggregators are largest. Sensitivity analysis suggests that, for global trade reform, the ease of substitution between tariff lines is much more important than that between varieties from different countries.

Suggested Citation

  • Laborde Debucquet, David & Martin, Will & van der Mensbrugghe, Dominique, 2011. "Measuring the impacts of global trade reform with optimal aggregators of distortions:," IFPRI discussion papers 1123, International Food Policy Research Institute (IFPRI).
  • Handle: RePEc:fpr:ifprid:1123
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    References listed on IDEAS

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    Cited by:

    1. Morley, Samuel & Piñeiro, Valeria & Robinson, Sherman, 2011. "External shocks and policy alternatives in small open economies: The case of El Salvador," IFPRI discussion papers 1134, International Food Policy Research Institute (IFPRI).
    2. Robert M'barek & Jesus Barreiro-Hurle & Pierre Boulanger & Arnaldo Caivano & Pavel Ciaian & Hasan Dudu & Maria Espinosa Goded & Thomas Fellmann & Emanuele Ferrari & Sergio Gomez Y Paloma & Celso Gorri, 2017. "Scenar 2030 - Pathways for the European agriculture and food sector beyond 2020," JRC Working Papers JRC108449, Joint Research Centre (Seville site).
    3. Takeshima, Hiroyuki & Salau, Sheu, 2011. "How does ownership of farm implements affect investment in other farm implements when farmers' liquidity constraint is relaxed?: Insights from Nigeria," IFPRI discussion papers 1133, International Food Policy Research Institute (IFPRI).
    4. Glendenning, Claire J. & Asenso-Okyere, Kwadwo & Babu, Suresh C., 2011. "Evaluation of value-added agricultural advisory services: Case study of agriclinics in Southern India," IFPRI discussion papers 1125, International Food Policy Research Institute (IFPRI).
    5. Bernard Hoekman, 2013. "Re-Thinking Economic Development in the WTO," RSCAS Working Papers PP2013/09, European University Institute.
    6. Morley, Samuel & Piñeiro, Valeria & Robinson, Sherman, 2011. "A dynamic computable general equilibrium model with working capital for Honduras:," IFPRI discussion papers 1130, International Food Policy Research Institute (IFPRI).
    7. Yu, Bingxin & Nin-Pratt, Alejandro & Funes, José & Gemessa, Sinafikeh Asrat, 2011. "Cereal production and technology adoption in Ethiopia:," IFPRI discussion papers 1131, International Food Policy Research Institute (IFPRI).
    8. Charness, Gary & Viceisza, Angelino, 2011. "Comprehension and risk elicitation in the field: Evidence from rural Senegal," IFPRI discussion papers 1135, International Food Policy Research Institute (IFPRI).
    9. Himics, Mihály & Britz, Wolfgang, 2016. "Flexible and welfare-consistent tariff aggregation over exporter regions," Economic Modelling, Elsevier, vol. 53(C), pages 375-387.
    10. Anderson, Kym & Strutt, Anna, 2012. "Asia’s Growth, the Changing Geography of World Trade, and Food Security: Projections to 2030," CEPR Discussion Papers 8950, C.E.P.R. Discussion Papers.
    11. Luca Salvatici & Alessandro Antimiani & Fusacchia Ilaria, 2018. "Value Added Trade Restrictiveness Indexes. Measuring Protection Within Global Value Chains," Departmental Working Papers of Economics - University 'Roma Tre' 0238, Department of Economics - University Roma Tre.
    12. Vanzetti, David & Peters, Ralf, 2013. "Trade and agricultural employment linkages in general equilibrium modelling," 2013 Conference (57th), February 5-8, 2013, Sydney, Australia 152182, Australian Agricultural and Resource Economics Society.
    13. Bernard M. Hoekman, 2013. "Multilateral Institutions and African Economic Integration," RSCAS Working Papers 2013/67, European University Institute.

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    Keywords

    aggregation; distortions; economic welfare measurement; Trade reform; trade restrictiveness;

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