← Search Journal of Political Economy Vol. 45 No. 2 1937 American Economic Progress. Harrison B. Fagan I. Lippincott DOI10.1086/255064 Volume45 Issue2 Pages285-286 Languageen 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 ✓