1Von Hippel E. The Sources of Innovation. New York : Oxford University Press, 1988
2Maskell P. Towards a knowledge - based theory of the geographical cluster. Industrial and Corporate Change, 2001, 10 (4) :921 - 944
3Kieron Meagher, Mark Rogers. Network density and R & D spillovers. Journal of Economic Behavior & Organization, 2004, 53 : 237 - 260
4Stephanie Monjon, Patrick Waelbroeck. Assessing spillovers from universities to firms : evidence from French firm - level data. International Journal of Industrial Organization, 2003( 21 ) : 1255 - 1270
5Rosenberg N, Nelson R R. American universities and technical advance in industry. Research Policy, 1994(23) :323 - 348
6Malmberg A, P Maskell. The elusive concept of localization economies : Towards a knowledge - based theory of spatial clustering. Environment and Planning, 2002(34) :429 - 49
7Mansfield E. Academic research underlying industrial innovations: sources, characteristics, and financing. Review of Eeonomies and Statisties, 1995(77) :55 - 65
8Harabi N. Channels of R & D Spillovers :An Empirical Investigation. Technovation, 1997,17 (11) : 627 - 635
9Griliches Z. R & D and Productivity :The Econometric Evidence, Chicago:The University of Chicago Press, 1998
10Castillo J. A Note on the Concept of Tacit Knowledge. Journal of Management Inquiry, 2002( 11 ) : 46 - 57