← Search The Review of Economics and Statistics Vol. 61 No. 2 1979 Proxy Variables and Specification Bias Peter A. Frost DOI10.2307/1924606 Volume61 Issue2 Pages323 Sources semanticscholar openalex crossref 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 ✓