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These are the Correlates of War major powers data.

Usage

cow_majors

Format

A data frame with 14 observations on the following 8 variables.

ccode

a numeric vector for the Correlates of War country code

styear

the start year as a major power

stmonth

the start month as a major power

stday

the start day as a major power

endyear

the end year as a major power

endmonth

the end month as a major power

endday

the end day as a major power

version

a version identifier

Details

Data are provided "as-is" with no additional re-cleaning before inclusion into this data set (beyond eliminating the state abbreviation).

References

Correlates of War Project. 2017. "State System Membership List, v2016." Online, https://correlatesofwar.org/data-sets/state-system-membership