Overcoming the infeasibility of super-efficiency DEA model: a model with generalized orientation

Gang Cheng, Zhenhua Qian and Panagiotis Zervopoulos

MPRA Paper from University Library of Munich, Germany

Abstract: The super-efficiency (SE) model is identical to the standard model, except that the unit under evaluation is excluded from the reference set. This model has been used in ranking efficient units, identifying outliers, sensitivity and stability analysis, measuring productivity changes, and solving two-player games. Under the assumption of variable, non-increasing and non-decreasing returns to scale (VRS, NIRS, NDRS), the SE model may be infeasible for some efficient DMUs. Based on the necessary and sufficient conditions for the infeasibility of SE, in the current paper, we have developed a DEA model with generalized orientation to overcome infeasibility issues. The DEA model with generalized orientation extends the orientation of the DEA model from the traditional input-orientation and output-orientation to the modified input-orientation, input-prioritized non-orientation, modified output-orientation, and output-prioritized non-orientation. All of the extended orientations are always feasible in the associated super-efficiency models. In addition, the modified input-oriented and the modified output-oriented approaches are developed to deal with the problem of infeasibility in super-efficiency models while keeping the concordance with the traditional oriented models. The newly developed model is illustrated with a real world dataset.

Keywords: Data envelopment analysis (DEA); Super-efficiency (SE); Infeasibility; Orientation (search for similar items in EconPapers)
JEL-codes: C02 C61 C67 (search for similar items in EconPapers)
Date: 2011-07-03
New Economics Papers: this item is included in nep-eff
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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