← Search Econometrica Vol. 29 No. 2 1961 Econometrics John L. Dillon; Stefan Valavanis; Alfred H. Conrad DOI10.2307/1909297 Volume29 Issue2 Pages255 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 ✓