5Arrow, K. J. The economic implications of learning by doing [J]. Review of Economic Studies, 1962,29(2) :155 -173.
6Mansfield, E. Social and private rates of return from industri- al innovations[ J]. Quarterly Journal of Economies, 1977, 91 : 221 -240.
7Estache, A. , Gaspar, V. Why tax incentives do not promote investment in Brazil[ A]. Fiscal Incentives for Investment and Innovation[M]. Edited by K. Shah, A. Shah. New York: Oxford University Press, 1995: 309- 340.
8Bemstein, J. I. The effect of direct and indirect tax incen- tives on Canadian industrial R&D expenditures[ J ]. Canadian Public Policy,1986,12(3) : 438 -448.
9Shah, K. , Shah, A. Fiscal incentives for investment and in- novation[ M]. The World Bank, 1995.
10Mansfield, E. The R&D tax credit and other technology policy issues [ J]. American Economic Review, 1986, (76) : 190 - 194.