← Search Econometrica Vol. 20 No. 4 1952 Economie et Interet J. Ullmo; Maurice Allais DOI10.2307/1907655 Volume20 Issue4 Pages690 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 ✓