cow_alliance {peacesciencer}

Correlates of War directed dyad-year alliance data

Description

These are version 4.1 of the Correlates of War directed dyad-year alliance data.

Usage

cow_alliance

Format

A data frame with 120784 observations on the following 7 variables.

ccode1

a numeric vector for the Correlates of War state code for the first state

ccode2

a numeric vector for the Correlates of War state code for the second state

year

a numeric vector for the year

cow_defense

a numeric vector that equals 1 if the alliance included a defense pledge

cow_neutral

a numeric vector that equals 1 if the alliance included a neutrality pledge

cow_nonagg

a numeric vector that equals 1 if the alliance included a non-aggression pledge

cow_entente

a numeric vector that equals 1 if the alliance included a pledge to consult if a crisis occurred

Details

The directed dyad-year alliance data are for alliance initiations, not straight dyad-years, "per se." This suggests the presence of duplicate directed dyad-years. For computing ease, given the intended use, I take care of these duplicate dyad-years behind the scenes. Consider the case of the U.S. and Canada in 1958. Therein, there were apparently two separate alliance initiations that included defense pledges. My behind-the-scenes cleaning process groups by ccode1, ccode2, and year and summarizes those alliance pledge variables. I then replace any value greater than 1 with 1. This indicates the presence or absence of a defense pledge in a given directed dyad-year.

References

Gibler, Douglas M. 2009. International Military Alliances, 1648-2008. Congressional Quarterly Press.