5Bernstein, Jeffrey. The structure of canadian interindustry R&D spillovers and the rates of return to R&D [J]. Journal of Industrial Economics, 1989: 21, pp: 324-4.
6Jones, Charles . I, Williams. Measuring the social return to R&D [J]. Federal Reserve Board, Washington, DC, 1997.
7Damiano, B. S. The economics of cooperation and competition in research and development: A Survey, Working paper, 2003.
8Lach, S. Do R&D subsidies stimulate or displace private R&D, evidence from israel[J]. The Journal of Industrial Economics, Vol, 2002, L (4): 369-390.
9Bloom, N., R. Griffith, J. van Reenen. Do R&D Credits Work? Evidence from a Panel of Countries 1979 -97. Journal of Public Economics, 2002, 85 (1): 1 -31.
10Emmanuel, Duguet. Are R&D subsidies a substitute or a complement to privately funded R& D? Evidence from france using propensity score methods for Non- Experimental data [J]. Research Policy, 2003, 29/4 -5, 449 -469.