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Coverage

The procedures that we implement ensure that for each country in the ITPD-E there is a sufficient number of observations in at least one industry that are meaningful for estimation purposes. The final dimensions of our database are as follows. In terms of years, the ITPD-E covers the 17-year period between 2000 and 2016. After combining the raw data from the four main sectors and implementing the data cleaning and construction procedures, we end up with about two million observations in each year. About a million observation each year has positive trade flows. The number of observations varies significantly across sectors. Usually, and as expected, in each year the large bulk of the data pertains to manufacturing. However, we also have significant number of observations for agriculture (around 75,000 non-zero trade observations per year and about 160,000 observations overall), for mining and energy (around 15,000 non-zero trade observations per year and about 35,000 observations overall), and for services (around 20,000 non-zero trade observations per year and about 40,000 observations overall).

The ITPD-E covers 170 industries. Of those, 26 are in agriculture, 7 are in mining and energy, 120 are in manufacturing, and 17 are in services. The industry coverage table lists the 170 industries covered in ITPD (in Column 1), and their corresponding ITPD codes (in Column 2). In addition, for each industry, the table reports average positive exports (in Column 3), maximum exports (in Column 4), total number of observations (in Column 5), and total number of zeroes (in Column 6). Note that trade in this table includes both international and domestic trade, so the maximum exports are typically from the domestic trade. Industries 1-26 belong to the “Agriculture” broad sector. Industries 27 to 33 belong to the “Mining and energy” broad sector. Industries 34 to 153 belong to the broad sector “Manufacturing”. Finally, industries 154 to 170 belong to the broad sector “Services”.

Our sectoral coverage closely follows the ISIC rev. 4 classification system. Our Agriculture broad sector corresponds to division A-01 “Crop and animal production” in ISIC. Mining and energy broad sector includes ISIC sections B and D. The manufacturing broad sector corresponds to section C. The services broad sector includes sections F through K, M, N, and P through S. Several ISIC divisions are not included in the initial release of ITPD-E. They include ISIC divisions A-02 “Forestry” and A-03 “Fishing”, and mostly non-traded ISIC sections L “Real Estate”, O “Government”, T “Household production”, and U “Extraterritorial organizations”. We were careful to avoid double-counting of industries when assembling data from multiple sources. For example, manufactured food is included in the manufacturing broad sector and not in the agriculture.

In terms of country coverage, the ITPD-E includes 243 countries.1 There are only two countries (French Guiana and Monaco) in the ITPD-E that appear only as exporters but not as importers. For all other countries there is data as both exporters and importers. The country coverage table lists the 243 countries covered in ITPD-E (in Column 2), and their corresponding 3-letter ISO codes (in Column 1).2 In addition, for each country, the table reports average positive exports (in Column 3), maximum exports (in Column 4), total number of observations (in Column 5), and total number of zeroes (in Column 6). Similarly to the industry coverage table, trade in the country coverage table includes both international and domestic trade, so the maximum exports are typically from the domestic trade.

  1. Consistent with the practice in USITC’s DGD, the number of countries in the text and in reflects the total number of distinct entities. In cases when countries split at certain points in history, this then includes the single code for both regions prior to the split as well as the two newly created codes post-separation. In ITPD-E this is the case for “Serbia and Montenegro (SCG)” prior to 2006, which appear as Serbia (SRB) and Montenegro (MNE) respectively afterwards, as well as for “Netherlands Antilles (ANT)”, which appear as Curacao (CUW) and Sint Maarten (SXM) after 2010, even though both entities continue to be part of the Kingdom of the Netherlands. ↩

  2. There are three countries that have multiple 3-letter alpha codes in the alternative original databases, which were used to construct ITPD-E. These countries are Chinese Taipei (Taiwan), which appears as CHT or TWN, the Democratic Republic of Congo, which appears as DRC, ZAR, or COD, and Romania, which appears as ROM or ROU. Without any strong preference and any implications, and only for consistency purposes and ease of use of ITPD-E, we selected to use TWN, COD, and ROU. ↩