共 28 条
[1]
ACS ZJ, 1989, KYKLOS, V42, P171
[3]
Bound J., 1984, R D PATENTS PRODUCTI, P21
[5]
COMMENT R, 1994, UNPUB J FINANCIAL EC
[6]
DRUCKER P, 1988, WALL STREET J 0210
[8]
GRILICHES Z, 1994, AM ECON REV, V84, P1
[9]
HALL BH, 1993, AM ECON REV, V83, P259
[10]
PROPERTY-RIGHTS AND THE NATURE OF THE FIRM
[J].
JOURNAL OF POLITICAL ECONOMY,
1990, 98 (06)
:1119-1158