← Search American Economic Review Vol. 80 No. 2 1990 Semiparametric Estimation of Selection Models: Some Empirical Results Whitney K. Newey; James L. Powell; James R. Walker Volume80 Issue2 Pages324-328 Sources bibtex:phds-export.bib Cite APA 7 MLA 9 Chicago (author–date) Harvard Elsevier Harvard (JFE, JBF…) The Accounting Review Academy of Management American Marketing Association INFORMS (Management Science) Copy citation Copied ✓