6Aaron, H. (1966), "The social insurance paradox", Canadian Journal of Economics and Political Science 3:371 -374.
7Becker, G.S. & R. J. Barro( 1988), "A reformulation of the economic theory of fertility", The Quarterly Journal of Economics 103(1) :1 -25.
8Becker, G.S. , K. M. Murphy & R. Tamura( 1990), "Human capital, fertility, and economic growth", The Journal of Political Economy 98(5) :S12 - S37.
9Buiter, W.H. & K. M. Kletzer(1995), "Capital mobility, fiscal policy, and growth under self- financing of human capital formation", The Canadian Journal of Economics 28 : 163 - 194.
10Diamond, P. (1965), "National debt in a neoclassical growth model", American Economic Review 55 (5) : 1126 - 1150.
