← Search Journal of Political Economy Vol. 35 No. 2 1927 Principles of Economics. O. Fred Boucke Frank H. Knight DOI10.1086/253848 Volume35 Issue2 Pages315-317 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 ✓