← Search American Economic Review Vol. 68 No. 4 1978 Vertical Integration: The Monopsony Case Martin K. Perry Volume68 Issue4 Pages561-570 Sources bibtex:phds-export.bib 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 ✓