Sample Selection Bias as a Specification Error
James J.Heckman
工作经验英文Econometrica,Vol.47,No.1.(Jan.,1979),pp.153-161.original sin
Stable URL:
蜜粉刷
/sici?sici=0012-9682%28197901%2947%3A1%3C153%3ASSBAAS%3E2.0.CO%3B2-J Econometrica is currently published by The Econometric Society.
2013年英语四级成绩查询Your u of the JSTOR archive indicates your acceptance of JSTOR's Terms and Conditions of U,available at
广东医学院录取查询
/about/terms.html.JSTOR's Terms and Conditions of U provides,in part,that unless you have obtained prior permission,you may not download an entire issue of a journal or multiple copies of articles,and you may u content in the JSTOR archive only for your personal,non-commercial u.
Plea contact the publisher regarding any further u of this work.Publisher contact information may be obtained at
/journals/econosoc.html.
Each copy of any part of a JSTOR transmission must contain the same copyright notice that appears on the screen or printed page of such transmission.
JSTOR is an independent not-for-profit organization dedicated to and prerving a digital archive of scholarly journals.For more information regarding JSTOR,plea contact
cond怎么读
深圳英语培训班Wed Apr1811:20:522007
橡皮擦用英语怎么说
kindof
snow day
