共 51 条
[1]
Anas A, 1998, J ECON LIT, V36, P1426
[4]
[Anonymous], NONPARAMETRIC SEMIPA
[5]
[Anonymous], TRANSPORTATION RES R
[6]
[Anonymous], 1994, HDB ECONOMETRICS
[7]
BARNETT WA, 1991, NONPARAMETRIC SEMIPA