1Wu J,Tu R.CEO stock option pay and R&D spending:a behavioral agency explanation[J].Journal of Business Research,2007(05).
2Blundell R,Griffith R,Van Reenen J.Dynamic count data models of technological innovation[J].The Economic Journal,1995.
3Nickell S,Nicolitsas D,Dryden N.What makes firms perform well[J].European Economic Review,1997(03).
4Lee C.Competition favors the prepared firm:Firms’R&D responses to competitive market pressure[J].Research Policy,2009(05).
5Petersen,M.A.,Estimating Standard Errors In Finance Panel Data Sets:Comparing Approaches[J].Review Of Financial Studies,2009.
6Crepon B, Duguet E, Mairessec J. P, esearch,hmovation And Productivi [Ty: An Econometric Analysis At The Firm kcvel[J].Eco,mmics of Innovation and new Technology, 1998(02).
