1. Aaron, Henry J. (1977), Demographic Effects on the Equity of Social Security Benefits, Washington, DC: Brookings Institution.
2. Adjei, Eric N. A. (1999), “Pension schemes in Africa. The national experience of Ghana.” ISSA Regional Conference for Africa, July.
3. Arrow, Kenneth, J. (1974), Essays in the Theory of Risk-Bearing, North Holland/American Elsevier.
4. Barr, Nicholas (1998), The Economics of the Welfare State, Third Edition, Oxford: Oxford University Press.
5. Baxter, Marianne (2002), “Social Security as a financial asset: gender-specific risks and returns”, Journal of Pension Economics and Finance (PEF) 1 (1): 345–52, March, 2002.