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Journal of Economic Integration 2008 September;23(3) :685-708.
DOI: https://doi.org/10.11130/jei.2008.23.3.685
Methods to Aggregate Import Tariffs and their Impacts on Modeling Results
Janine Pelikan and 
Martina Brockmeier 
Johann Heinrich von Thünen Institute (vTI)
Copyright ©2008 Journal of Economic Integration
ABSTRACT

When impacts of WTO market access proposals are analyzed with economic trade models, it is necessary to aggregate tariff data from the detailed tariff line level to the model level. In this article import tariffs and implemented import tariff cuts are aggregated from the HS6-digit tariff line level with the simple and trade weighted average, the Trade Restrictiveness Index (TRI) and the Mercantilist Trade Restrictiveness Index (MTRI) by considering bound and applied tariff rates. The resulting tariffs are substituted for the originally applied import tariffs of the GTAP data base. Multilateral trade liberalization scenarios are then implemented and the welfare effects are compared.

JEL classification: F13, F17, Q17

Keywords: import tariff aggregation | tariff cutting scenarios | bound and applied tariffs | WTO negotiations | CGE modeling | agricultural trade policy
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