共 8 条
[1]
计量经济学教程[M]. 北京交通大学出版社 , 孙敬水主编, 2005
[2]
Motives to patent: Empirical evidence from Germany[J] . Knut Blind,Jakob Edler,Rainer Frietsch,Ulrich Schmoch.Research Policy . 2006 (5)
[3]
Patent applications and subsequent changes of performance: evidence from time-series cross-section analyses on the firm level[J] . Holger Ernst.Research Policy . 2001 (1)
[5]
An Event-Study Approach to Measuring Innovative Output: The Case of Biotechnology[J] . David H. Austin.The American Economic Review . 1993 (2)
[6]
Patent Statistics as Economic Indicators: A Survey[J] . Zvi Griliches.Journal of Economic Literature . 1990 (4)
[8]
Corporate Inventive Output, Profits, and Growth[J] . F. M. Scherer.Journal of Political Economy . 1965 (3)