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GTAP Resource #4419

"Construction of ITC MACMAP tariff dataset"
by Pichot, Xavier, Mondher Mimouni, Badri Narayanan and Janine Pelikan

In this paper, we summarize the methodology involved in constructing the ITC MACMAP dataset and its inclusion into GTAP Data Base. In addition, we also present several comparisons performed across different alternative methodologies as well as different versions and years of GTAP Data Base.

The raw data on tariff exists at tariff-line level. AVEs (Ad Valorem Equivalents) of TRQs (Tariff Rate Quotas) and specific tariff are calculated at this level. Bilateral trade data is available for many but not for all of the tariff-lines and countries. Otherwise HS6-level Reference Group or world trade data is used to calculate the UV (Unit Values), which varies across reporters and tariff-lines, but not across partners. The reason for moving from tariff-line to HS6 level for UV is that harmonization across countries is difficult at tariff-line level. However, for the quota fill rates calculated in the TRQs, they always employ trade quantities at tariff-line level.
This is aggregated to HS6 (version HS2007) level. Ad valorem and AVEs of specific tariffs are aggregated using weights of number of tariff-lines. Such an aggregated ad valorem tariff does not incorporate the fact that TRQs are imposed. However, they do contain information on the out-of-quota tariff rates, both in terms of ad valorem and AVE. When an in quota tariff is implemented for a given tariff line, the effective AVE will be lower than the aggregate AVE calculated as above, since it will be a weighted average of these out-of-quota tariff rates as well as marginal tariff rates and in-quota tariff rates, which are both less than the former. When there is no TRQ, the total tariff is the same as the total ad valorem equivalent. AVEs are capped at 1000% because that could be due to problematic unit values, while ad valorem tariff data is used as is, since it is real data.

Mixed tariffs are complicated in many cases. For example, the rule could suggest the minimum AVE among two different ad valorem and ...

Resource Details (Export Citation) GTAP Keywords
Category: 2014 Conference Paper
Status: Published
By/In: Presented at the 17th Annual Conference on Global Economic Analysis, Dakar, Senegal
Date: 2014
Created: Pichot, X. (4/14/2014)
Updated: Douglas, J. (3/31/2017)
Visits: 3,424
- Preferential trading arrangements
- Other data bases and data issues
- The GTAP Data Base and extensions

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