共 29 条
[2]
BARON DP, 1978, J ECON BUS, V30, P98
[4]
BAUMOL WJ, 1977, AM ECON REV, V67, P809
[5]
BAYS CW, 1980, REV EC STAT MAY, P302
[6]
BERRY RE, 1967, HEALTH SERV REP, V2, P123
[8]
PRODUCTIVITY IN UNITED-STATES RAILROADS, 1951-1974
[J].
BELL JOURNAL OF ECONOMICS,
1980, 11 (01)
:166-181
[9]
CAVES DW, 1976, SEP WINT M EC SOC