The iso3c column aren not ISO 3166-1 alpha-3 codes based on the UN Statistics division. Naming them iso3c is misleading.
I believe these are custom 3-letter country codes in the Gleditsch & Ward data that I am guessing are based on COW 3-letter country codes (with a few exceptions).
The countrycode package has all three codes to verify these aren't iso3c codes:
The
iso3c
column aren not ISO 3166-1 alpha-3 codes based on the UN Statistics division. Naming themiso3c
is misleading.I believe these are custom 3-letter country codes in the Gleditsch & Ward data that I am guessing are based on COW 3-letter country codes (with a few exceptions).
The countrycode package has all three codes to verify these aren't iso3c codes: