共 9 条
[8]
Productivity, R and D, and Basic Research at the Firm Level in the 1970's[J] . Zvi Griliches.The American Economic Review . 1986 (1)
[9]
ISSUES IN ASSESSING THE CONTRIBUTION OF RESEARCH AND DEVELOPMENT TO PRODUCTIVITY GROWTH
[J].
BELL JOURNAL OF ECONOMICS,
1979, 10 (01)
:92-116