共 19 条
- [1] *ASS AM RAILR, 1980, EC ABZ RAILR IND
- [2] Blackorby C., 1978, DUALITY SEPARABILITY
- [4] PRODUCTIVITY IN UNITED-STATES RAILROADS, 1951-1974 [J]. BELL JOURNAL OF ECONOMICS, 1980, 11 (01): : 166 - 181
- [5] CAVES DW, 1981, REEXAMINATION SCALE
- [8] DANZIG J, 1976, PROCEDURES ANAL EC C
- [9] DENNY M, 1977, AM ECON REV, V67, P404
- [10] FRIEDLAENDER AF, 1981, FREIGHT TRANSPORT RE