8F. R. Lichtenberg. The Relationship Between FederalContract R&D and Company R&D [ J ]. The American Eco-nomic Review, 1984,V74(2) : 73 -85.
9Dominique Guellec, Bruno Van Pottelsberghe De La Potte-rie. The Impact of Public R&D Expenditure on Business R&D[J]. Economics of Innovation and New Technology,2003,V12(3) : 225 -243.
10Klaus Wade, Ulrich Woitek. R&D Expenditure in G7Countries and the Implications for Endogenous Fluctuations andGrowth [ J ]. Economics Letters, 2004,V82( 1 ) : 91 -97.
