The regressions include all countries that have data on all of the variables.
We began with a sample of 87 countries, but the inclusion of data on church attendance and
religious beliefs lowered the sample to 41 countries.
We end up with 2 countries in sub-Saharan Africa, 8 in Latin America, 9 in Asia, 2 in Eastern Europe, and 20 that have been members of the OECD since the 1960s (not including Japan and Turkey, which are included with Asia).