JAUMOTTE F,PAIN N.Innovation in the business sector[EB/OL].OECD Economics Department Working Papers NO.459,2005.http://ideas.repec.org/p/oec/ecoaaa/459-en.html.
[19]
JAUMOTTE F,PAIN N.From ideas to development:the determinants of R&D and patenting[EB/OL].OECD Economics Department Working Papers NO.457,2005.http://ideas.repec.org/p/oec/ecoaaa/457-en.html.
[20]
SCHERER F M.Market structure and the employment of scientists and engineers[J].American Economic Review,1967,57(3):524-531.
[21]
ROMER P M.Endogenous technological change[J].Journal of Political Economy,1990,98(5):71-102.