← Search Econometrica Vol. 34 No. 4 1966 Oskar Ryszard Lange, 1904-1965 Walter D. Fisher DOI10.2307/1910095 Volume34 Issue4 Pages733 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 ✓