1Todtling F. Technological Change at the regional level[J]. Envi- ronment and Planning A, 1992,24( 11 ) : 1565-1584.
2Stern Porter and Furman Measuring the "Ideas"Produetion Fune tion: Evidence from International Patent Output [R]. NBER Working Paper, 7891,2000.
3FritsehM. Measuring the quality of regional innovation systems-a knowledge production function approach [J]. International Re- gional Science Review,2002, (25) : 86-101.
1Feldman 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.
2Furman J, Porter M, Stern S. The Determinants of National Innovative Capacity [ J ]. Research Policy, 2002, ( 31 ) : 899 - 933.
3Liu X, Buck T. Innovation Performance and Channels for International Technology Spillovers: Evidence from Chinese High - tech Industries [ J ]. Research Policy, 2007, ( 36 ) : 1329 - 1354.
4Coe D. and Helpman E. International R&D Spillovers [ J ]. European Economic Review, 1995, (39) : 859 - 887.
5ConnoUy M. The Dual Nature of Trade: Measuring Its Impact on Imitation and Growth [ J]. Journal of Development Economics,2003, ( 72 ) : 31 - 55.
6Romer P. Endogenous Technological Change [ J ]. Journal of Political Economy, 1990,98 ( 5 ) : S71 - S102.
7Jones C I. R&D Based Models of Economic Growth [ J ].Journal of Political Economy, 1995,103(4) : 739 -784.
8Griliches Z. Patent Statistics as Economic Indicators: A Survey [ J ]. Journal of Economic Literature, 1990, (92) : 630 - 653.
9Acs Z. J. ,and Audretsch D. Patents as A Measure of Innovative Activity [ J ]. Kyklos, 1989,42 (2) : 171 - 180.
10Jaffe A. B. Real Effects of Academic Research [ J ].American Economic Review, 1989, (79) : 957 - 970.
