CEPII, Recherche et Expertise sur l'economie mondiale
World Trade Flows Characterization

Data 2015


Trade Unit Values, CEPII's database providing a world trade matrix of unit values for more than 230 countries and 5 100 products over the period 2000-2015.

The decomposition allows to associate each flow with a trade type (one-way trade, intra-industry trade in similar products or in differentiated products) and a price range (low, middle or high range).

Three databases are available :
  • trad_charact_0015  provides a trade type and price range for each exporter, importer, year and product at the 6-digit level of the nomenclature of products (revision 1996 of the HS).*
  • price_range_chelem0015 gives the value of trade in thousands of US dollars for the three different price ranges (High, Medium and Low), for each exporter, importer, year and group of product (industry) following the CHELEM nomenclature.
  • type_chelem0015 gives the value of trade in thousands of US dollars for the four different trade types (OWT, TWT, TWH, TWV), for each exporter, importer, year and group of product following the CHELEM nomenclature.

* Information on the value of trade for each flow is not included. If needed, the database can be merged with another trade database (BACI or COMTRADE for example), to get trade values.

 Methodology: a Short Description
Trade characteristics are computed using an harmonized version of CEPII's Trade Unit Values (TUV) database. Using TUV database allows to have reliable and consistent trade unit values as compared to other databases (particularly COMTRADE which unit values can derive from estimations based on world means). The harmonization procedure allows to increase the number of unit values documented. Harmonization takes advantage of mirror flows of the TUV database: it compares import unit values (relying on importers' declarations) and export unit values (relying on exporters' declarations) and compute a single value for each flow. The resulting database, the harmonized TUV database, provides more reliable data, for a large coverage of countries, products and years.

We use this harmonized Trade Unit Values database to compute two measures of the share of intra-industry trade in world trade: the Grubel-Lloyd index (GL) and the Fontagné and Freudenberg index (FF). A price range is also assigned to each elementary flow depending on its unit value relatively to a world reference.

Presentation

Reference document to mention
C. Emlinger & S. Piton, (2014), 'World Trade Flows Characterization: Unit Values, Trade Types and Price Ranges', CEPII Working paper, n°2014-26.

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 Contact
sophie.pitoncepii.fr