共 54 条
[1]
Aigner D., 1977, Journal of Econometrics, V6, P21, DOI [DOI 10.1016/0304-4076(77)90052-5, 10.1016/0304-4076(77)90052-5]
[4]
[Anonymous], ATTAINMENT SECONDARY
[5]
[Anonymous], 1997, NO MOR EXC NEW APPR