共 11 条
[1]
Bound J., 1984, R D PATENTS PRODUCTI, P21
[2]
BRAINARD WC, 1980, BROOKINGS PAP ECO AC, P453
[3]
COCKBURN I, 1988, AM ECON REV, V78, P419
[4]
DOWNS TW, 1988, AM ECON REV, V78, P1118
[5]
FAZZARI SM, 1988, BROOKINGS PAPERS EC, V1, P141, DOI DOI 10.2307/2534426
[8]
Levin R., 1987, BROOKINGS PAPERS EC, V18, P783, DOI DOI 10.2307/2534454
[10]
PROFIT RATES AND INTANGIBLE CAPITAL
[J].
REVIEW OF ECONOMICS AND STATISTICS,
1991, 73 (04)
:632-642