8Salai-Martin, X. Xavier. A Positive Theory of Social Security [ J]. Journal of Economic Growth, 1996, (2).
9Giorgio Bellettini, Carlotta Berti Ceroni. Social Security Expenditure and Economic Growth: An Empirical Assessment [ J ]. Research in Economics, 2000, (3).
10Wouter Zant. Social Security Wealth and Aggregate Consumption : An Extended Life-cycle Model Estimate for the Netherlands [ J ]. De Economist, 2005, (1).