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Bilateral Trade (v3.0)

his data set tracks total national trade and bilateral trade flows between states from 1870-2009. This data set is hosted by Katherine Barbieri, University of South Carolina, and Omar Keshk, Ohio State University.

International Trade, 1870-2009 (v3.0)


The trade dataset is the result of the effort to code trade flows between states (as defined by the Correlates of War project) for the period 1870-2009. The data include information on both bilateral trade flows and total national imports and exports. The dyadic trade dataset describes import and export data in current U.S. dollars for pairs of sovereign states. The National (Monadic) Trade dataset contains information on individual states import and export levels in current U.S. dollars. 


In any papers or publications that utilize this data set, users are asked to give the version number and cite data set, as follows:

Barbieri, Katherine and Omar Keshk. 2012. Correlates of War Project Trade Data Set Codebook, Version 3.0.   Online:

Barbieri, Katherine, Omar M. G. Keshk, and Brian Pollins. 2009. “TRADING DATA: Evaluating our Assumptions and Coding Rules.” Conflict Management and Peace Science. 26(5): 471-491.

Data Set

The trade data are distributed in two zip files, the first containing the main data and codebook, and the second containing supplementary source information (this information is not needed by most users). Note that these are large data sets in comma-delimited ascii format, with values separated by commas and ending in a .csv extension.  By default in Microsoft Windows, files with a .csv extension will open in Microsoft Excel.  However, Excel limits the size of spreadsheets. These data files contain more records than Excel allows, and Excel will thus only read part of the data set.  To use these datasets, you should use a statistics program such as SPSS or Stata (for instance, use Stata’s “insheet” command) to correctly access the full data.