← Search Journal of Political Economy Vol. 31 No. 6 1923 Two Classics on Consumers' Co-Operation Paul H. Douglas DOI10.1086/253568 Volume31 Issue6 Pages857-861 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 ✓