3Feldman M P, Florida R. The Geographic Sources of Innovation: Technological Infrastructure and Product Innovation in the United States [ J ]. Annals of the Association of American Geographers, 1994,84 (2) : 210 - 229.
4Furman J, Porter M, Stern S. The Determinants of National Innovative Capacity [ J ]. Research Policy, 2002, ( 31 ) : 899 - 933.
5Liu X, Buck T. Innovation Performance and Channels for International Technology Spillovers: Evidence from Chinese High - tech Industries [ J ]. Research Policy, 2007, ( 36 ) : 1329 - 1354.
6Coe D. and Helpman E. International R&D Spillovers [ J ]. European Economic Review, 1995, (39) : 859 - 887.
7ConnoUy M. The Dual Nature of Trade: Measuring Its Impact on Imitation and Growth [ J]. Journal of Development Economics,2003, ( 72 ) : 31 - 55.
8Romer P. Endogenous Technological Change [ J ]. Journal of Political Economy, 1990,98 ( 5 ) : S71 - S102.
9Jones C I. R&D Based Models of Economic Growth [ J ].Journal of Political Economy, 1995,103(4) : 739 -784.
10Griliches Z. Patent Statistics as Economic Indicators: A Survey [ J ]. Journal of Economic Literature, 1990, (92) : 630 - 653.
