← Search American Economic Review Vol. 66 No. 1 1976 The Xistence of X-Efficiency George J. Stigler Volume66 Issue1 Pages213-216 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 ✓