This is a complete (I believe) data set on Gleditsch-Ward states and Correlates of War states, a byproduct of a full_join() between gw_states and cow_states that leans largely on the state abbreviation variable.

## Usage

gw_cow_years

## Format

A data frame with 18425 observations on the following 6 variables.

gwcode

a Gleditsch-Ward state code

stateabb

the state abbreviation, which was the greatest source of agreement between both data sets

gw_statename

the state name as it appears in the Gleditsch-Ward data

ccode

a Correlates of War state code

cow_statename

the state name as it appears in the Correlates of War data

year

a numeric vector for the year

## Details

The data-raw directory on the project's Github contains more information about how these data were created. I'm going to use it for internal stuff. The workflow is going to treat the Gleditsch-Ward state system membership codes as more of the "master" codes, for which the user can add Correlates of War identifiers as they see fit. Data are extended to 2020, assuming no changes to state system membership for either data set.