← Search Econometrica Vol. 22 No. 4 1954 Economic Essays William J. Baumol; R. F. Harrod DOI10.2307/1907453 Volume22 Issue4 Pages539 Sources crossref semanticscholar openalex 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 ✓