← Search The Review of Economics and Statistics Vol. 13 No. 2 1931 Postal Revenues and the Business Cycle C. J. Bullock; B. Fox; A. R. Eckler DOI10.2307/1927402 Volume13 Issue2 Pages47 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 ✓