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Metadata Glossary

CodeTM.TAX.TCOM.SR.ZS
Indicator NameShare of tariff lines with specific rates, primary products (%)
Long definitionShare of tariff lines with specific rates is the share of lines in the tariff schedule that are set on a per unit basis or that combine ad valorem and per unit rates. It shows the extent to which countries use tariffs based on physical quantities or other, non-ad valorem measures. Primary products are commodities classified in SITC revision 3 sections 0-4 plus division 68 (nonferrous metals).
SourceStaff estimates, World Bank (WB); World Integrated Trade Solution system (WITS), World Bank (WB); Trade Analysis and Information System (TRAINS), UN Conference on Trade and Development (UNCTAD)
TopicTrade
DatasetWDI
PeriodicityAnnual
Statistical concept and methodologyMethodology: This indicator measures the share of tariff lines for primary products that are expressed in specific rather than ad valorem terms. Specific rates are defined as those based on quantity, weight, volume, or other non-percentage measures. The indicator is computed by dividing the number of specific-rate lines by the total number of lines and expressing the result as a percentage. Share of tariff lines with specific rates is the share of lines in the tariff schedule that are set on a per unit basis or that combine ad valorem and per unit rates. It shows the extent to which countries use tariffs based on physical quantities or other, non-ad valorem measures. Primary products are commodities classified in Standard International Trade Classification (SITC) revision 3 sections 0-4 plus division 68 (nonferrous metals). Tariff data are primarily sourced from the World Trade Organization (World Trade Organization (WTO)) Consolidated Tariff Schedules (Consolidated Tariff Schedules (CTS)) and Integrated Database (Integrated Database (IDB)), with supplementary inputs from the United Nations Conference on Trade and Development (United Nations Conference on Trade and Development (UNCTAD)). Data are submitted by national authorities using the Harmonized System (Harmonized System (HS)) classification. The WTO Secretariat validates and harmonizes submissions to a common HS version for comparability. Data are generally updated annually or as new schedules are submitted. Due to validation and alignment processes, there is typically a one- to two-year time lag between national reporting and publication. Only duty types explicitly identified as specific in national tariff schedules are counted. The methodology applies standardized classification across countries to enable cross-national comparability. No imputation is used.
License URLhttps://creativecommons.org/licenses/by/4.0/
License TypeCC BY-4.0
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