共 62 条
[2]
Ahn S., 2000, Econometric Reviews, V19, P461, DOI DOI 10.1080/07474930008800482
[4]
Aigner D., 1977, J. Econ., V6, P21, DOI [DOI 10.1016/0304-4076(77)90052-5, 10.1016/0304-4076(77)90052-5]
[6]
[Anonymous], 1996, AM ECON REV
[7]
[Anonymous], 1991, THESIS