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Description
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Dyadic Data Set. To assist research focusing on interstate dyads, we have converted the alliance data set into two auxiliary (dyadic-annual) files. These files contain information – on an annual basis – as to the alliance relationship between any two states. All dyad-years where some alliance tie is present are contained in these files – if a dyad-year is not listed, then there is no formal alliance between the two states in that year. When alliance membership changed during the year (e.g. if a country left an alliance on some date while the alliance itself continued, or it joined after the initial date of alliance creation), a check was performed to ensure that the dyad members were members of the alliance for at least one common day. If they were, then a record showing an alliance status for the year was created. 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. Zip file containing this data.
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