← Search Journal of Political Economy Vol. 69 No. 1 1961 Volume Discounts as Barriers to Entry and Access Robert C. Brooks DOI10.1086/258415 Volume69 Issue1 Pages63-69 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 ✓