1. Alber, J., Alesina, A., & Glaeser, E. L. (2004). Fighting poverty in the US and Europe: A world of difference. New York: Oxford University Press.
2. Ascoli, U., & Ranci, C. (Eds.). (2002). Dilemmas of the welfare mix: The new structure of welfare in an era of privatization. New York: Kluwer Academic/Plenum Publishers.
3. Baradaran, M. (2017). The color of money: Black banks and the racial wealth gap. Cambridge, MA: Belknap Press.
4. Blome, A., Keck, W., & Alber, J. (2009). Family and the welfare state in Europe: Intergenerational relations in ageing societies. Cheltenham, UK: Edward Elgar Publishing.
5. Burton, J. (2017a, April 25). 25 Highest income earning countries. World Atlas; Economics. Retrieved March 23, 2018 from https://www.worldatlas.com/articles/the-highest-incomes-in-the-world.html