共 26 条
[12]
Hampel F. R., 1968, THESIS U CALIFORNIA
[15]
IMBENS GW, 2009, ECONOMETRIC IN PRESS
[17]
Koenker R., 2005, Econometric Society Monographs, DOI [DOI 10.1017/CBO9780511754098, 10.1017/CBO9780511754098]