共 16 条
[1]
BANIA N, 1987, JUL W EC ASS M
[2]
BOUND J, 1984, R D PATENTS PRODUCTI, pCH2
[3]
CAMERON AC, 1986, J APPLIED ECONOMETRI, V1, P29, DOI DOI 10.1002/JAE.3950010104
[6]
ISSUES IN ASSESSING THE CONTRIBUTION OF RESEARCH AND DEVELOPMENT TO PRODUCTIVITY GROWTH
[J].
BELL JOURNAL OF ECONOMICS,
1979, 10 (01)
:92-116
[7]
GRILICHES Z, 1987, PATENT STATISTICS EC
[8]
Griliches Z., 1988, 2624 NAT BUR EC RES
[10]
JAFFE AB, 1986, AM ECON REV, V76, P984