共 14 条
[2]
CHIN JC, 1988, UNPUB INTELLECTUAL P
[4]
DEARDORFF AV, 1991, ECONOMICA
[5]
DIWAN I, 1991, J INT ECON, V29, P27
[6]
Firestone OJ., 1971, EC IMPLICATIONS PATE
[7]
LEVIN RC, 1988, AM ECON REV, V78, P424
[8]
LEVIN RC, 1989, 714 COWL F DISC PAP
[10]
IMITATION COSTS AND PATENTS - AN EMPIRICAL-STUDY
[J].
ECONOMIC JOURNAL,
1981, 91 (364)
:907-918