Xue, Mei; Harker, Patrick T. - Financial Institutions Center, Wharton School of Business - 1999
Andersen and Petersen (1993) presented an extension of the basic DEA methodology, called modified DEA, which has the desirable feature of ranking not only the inefficient DMUs, but the e ficient ones as well. However, when their basic approach is extended to the cases of variable returns to...