The all_iso_codes.csv file of country ISO codes with their regions comes from 
https://github.com/lukes/ISO-3166-Countries-with-Regional-Codes/blob/master/all/all.csv

The DevFi_Classification.xlsx was downloaded on May 25, 2023 from https://development-finance-codelists.oecd.org/Codeslist.aspx

The dhs_clusters.csv file came from the AI and Global Development Lab:
/mimer/NOBACKUP/groups/globalpoverty1/markus/data