← Search Quarterly Journal of Economics Vol. 29 No. 3 1915 Statistical Indices of Business Conditions Melvin T. Copeland DOI10.2307/1885464 Volume29 Issue3 Pages522 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 ✓