← Search American Economic Review Vol. 74 No. 4 1984 "Contestability" vs. Competition William G. Shepherd Volume74 Issue4 Pages572-587 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 ✓