← Search Econometrica Vol. 15 No. 2 1947 Irving Fisher at Eighty Ragnar Frisch DOI10.2307/1907063 Volume15 Issue2 Pages71 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 ✓