This is a complete directed dyad-year data frame of Gleditsch-Ward state system members. I offer it here as a shortcut for various other functions. As a general rule, this data frame is updated after every calendar year to include the most recently concluded calendar year.
Format
A data frame with the following 5 variables.
gwcode1a numeric vector for the Correlates of War state code for the first state
gwcode2a numeric vector for the Correlates of War state code for the second state
yeara numeric vector for the year
microstate1a numeric vector that equals 1 if the first state in the dyad is a micro-state. 0 if otherwise.
microstate2a numeric vector that equals 1 if the second state in the dyad is a micro-state. 0 if otherwise.