Description
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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. The state and dyad-level files contain too much data for Excel, and so Excel will 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. Data on IGOs from 1815-2000, at the dyad-year level (as in IGO_dyadunit_v2.1.zip), but with the data file saved in Stata (v8) format (.dta) rather than as a comma-delimited (.csv) file.
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