Cook, Wade; Chai, Dan; Doyle, John; Green, Rodney - In: Journal of Productivity Analysis 10 (1998) 2, pp. 177-198
Conventional applications of data envelopment analysis (DEA) presume the existence of a set of similar decision making units, wherein each unit is evaluated relative to other members of the set. Often, however, the DMUs fall naturally into groupings, giving rise first to the problem of how to...