共 24 条
[1]
[Anonymous], STAT ABSTR US
[3]
CAPRON WM, 1971, TECHNOLOGICAL CHANGE
[5]
PRODUCTIVITY IN UNITED-STATES RAILROADS, 1951-1974
[J].
BELL JOURNAL OF ECONOMICS,
1980, 11 (01)
:166-181
[7]
CAVES DW, 1980, 8002 U WISC SOC SYST
[8]
CAVES DW, 1980, 8004 U WISC SOC SYST
[9]
CAVES DW, 1980, 8022 U WISC SOC SYST
[10]
FRIEDLAENDER AF, 1971, AM ECON REV, V61, P226