← Search Quarterly Journal of Economics Vol. 84 No. 4 1970 Recent Publications DOI10.1093/qje/84.4.713 Volume84 Issue4 Pages713-715 Languageen 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 ✓