gw_system: States (Gleditsch-Ward System)

In isard: Overflow Data for Quantitative Peace Science Research

States (Gleditsch-Ward System)

Description

These are the independent states and microstates in the Gleditsch-Ward system.

Usage

gw_system

Format

A data frame with the following 6 variables.

gwcode

a numeric vector for the Gleditsch-Ward state code

gw_abb

a character vector for the state abbreviation

gw_name

a character vector for the state name

microstate

a numeric vector for whether the state is a microstate. 1 = microstate. 0 = not a microstate

start

a date for system entry

end

a date for system exit

Details

The end column is current as of Dec. 31, 2020. That date is reflected in the end column for states still active today.

References

Gleditsch, Kristian S. and Michael D. Ward. 1999. "A Revised List of Independent States since the Congress of Vienna." International Interactions 25(4): 393–413.

Examples

str(gw_system)
head(gw_system)

isard documentation built on April 11, 2025, 6:19 p.m.