Chapter 4
Economic Freedom in the World (Fraser Institute, Canada)
https://www.fraserinstitute.org/economic-freedom/map?geozone=world&page=map&year=2015
International Monetary Fund (IMF): http://www.imf.org/en/Data
Organization for Economic Cooperation and Development (OECD): http://www.oecd.org/
Comparative Welfare States Data set: http://www.nsd.uib.no/macrodataguide/set.html?id=8&sub=1