共 21 条
[2]
BALL L, 1984, UNPUB INT SUBST CONS
[3]
Chamberlain G., 1984, HDB ECONOMETRICS, V2, P1247, DOI DOI 10.1016/S1573-4412(84)02014-6
[6]
GROSSMAN SJ, 1981, AM ECON REV, V71, P222