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Metadata Glossary

CodeTM.TAX.TCOM.WM.AR.ZS
Indicator NameTariff rate, applied, weighted mean, primary products (%)
Short definitionWeighted mean applied tariff is the average of effectively applied rates weighted by the product import shares corresponding to each partner country. Data are classified using the Harmonized System of trade at the six- or eight-digit level. Tariff line data were matched to Standard International Trade Classification (SITC) revision 3 codes to define commodity groups and import weights. To the extent possible, specific rates have been converted to their ad valorem equivalent rates and have been included in the calculation of weighted mean tariffs. Import weights were calculated using the United Nations Statistics Division's Commodity Trade (Comtrade) database. Effectively applied tariff rates at the six- and eight-digit product level are averaged for products in each commodity group. When the effectively applied rate is unavailable, the most favored nation rate is used instead. Primary products are commodities classified in SITC revision 3 sections 0-4 plus division 68 (nonferrous metals).
Long definitionWeighted mean applied tariff is the average of effectively applied rates weighted by the product import shares corresponding to each partner country. Data are classified using the Harmonized System of trade at the six- or eight-digit level. Tariff line data were matched to Standard International Trade Classification (SITC) revision 3 codes to define commodity groups and import weights. To the extent possible, specific rates have been converted to their ad valorem equivalent rates and have been included in the calculation of weighted mean tariffs. Import weights were calculated using the United Nations Statistics Division's Commodity Trade (Comtrade) database. Effectively applied tariff rates at the six- and eight-digit product level are averaged for products in each commodity group. When the effectively applied rate is unavailable, the most favored nation rate is used instead. Primary products are commodities classified in SITC revision 3 sections 0-4 plus division 68 (nonferrous metals).
SourceStaff estimates; World Integrated Trade Solution system (WITS), World Bank (WB); Trade Analysis and Information System (TRAINS), UN Conference on Trade and Development (UNCTAD); Integrated Data Base (IDB), World Trade Organization (WTO); Consolidated Tariff Schedules (CTS), World Trade Organization (WTO)
TopicTrade
DatasetWDI
PeriodicityAnnual
Reference period1988-2022
Statistical concept and methodologyMethodology: This indicator computes the average of applied most-favored-nation (MFN) tariff rates for primary products, using import values as weights. Tariff lines with higher trade volumes have a proportionally greater influence on the final average. The weighted mean is derived by multiplying each tariff rate by its corresponding import value, summing these products, and dividing by the total import value. Weighted mean applied tariff is the average of effectively applied rates weighted by the product import shares corresponding to each partner country. Data are classified using the Harmonized System of trade at the six- or eight-digit level. Tariff line data were matched to Standard International Trade Classification (SITC) revision 3 codes to define commodity groups and import weights. To the extent possible, specific rates have been converted to their ad valorem equivalent rates and have been included in the calculation of weighted mean tariffs. Import weights were calculated using the United Nations Statistics Division's Commodity Trade (Comtrade) database. Effectively applied tariff rates at the six- and eight-digit product level are averaged for products in each commodity group. When the effectively applied rate is unavailable, the most favored nation rate is used instead. Primary products are commodities classified in 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. Trade data used for weighting are obtained from official national or international sources. Only lines with both valid tariff rates and trade values are included. Harmonized classifications are used to align trade and tariff data consistently.
License URLhttps://datacatalog.worldbank.org/public-licenses#cc-by
License TypeCC BY-4.0
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