共 48 条
[1]
AGNEW CE, 1978, SO EC ASS M
[2]
BAILY MN, 1988, INNOVATION PRODUCTIV
[3]
Belsley D. A., 1980, REGRESSION DIAGNOSTI
[4]
Bound J., 1984, R D PATENTS PRODUCTI, P21
[5]
BROWN RL, 1975, J ROY STAT SOC B MET, V37, P149
[7]
CLARK KB, 1984, R D PATENTS PRODUCTI, P393
[8]
COHEN W, 1987, J IND EC JUN, P543
[10]
DAVIS SJ, 1989, NATIONAL BUREAU EC R