3De Long, J Bradford. Productivity Growth, Convergence, and Welfare: Comment [ J ]. American Economic Review, 1988,78 (5).
4Baumol, William J & Wolff, Edward N. Productivity Growth, Convergence, and Welfare: Reply[J].American E-conomic Review, American Economic Association, 1988, 78(5).
5Mankiw, N Gregory & Romer, David & Weft, David N. " A Contribution to the Empirics of Economic Growth,[J].The Quarterly Journal of Economics, MIT Press, 1992,107(2).