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.
A data frame with the following 3 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
Details
Data are a quick generation from the create_dyadyears(system="gw") function in this package.