← Search Econometrica Vol. 49 No. 3 1981 Sample Selection Bias as a Specification Error: A Comment William H. Greene DOI10.2307/1911523 Volume49 Issue3 Pages795 Sources bibtex:phds-export.bib semanticscholar crossref openalex 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 ✓