Super-efficiency in Data Envelopment Analysis: An Application to Gas Companies

Conventional data envelopment analysis (DEA) assists decision makers in distinguishing between efficient and inefficient decision making units (DMUs) in a homogeneous group. However, DEA does not provide more information about efficient units. Super-efficiency DEA models can be used in ranking the performance of efficient DMUs. This research proposes a methodology to determine an Euclidean distance-based measure of super-efficiency. Then, the DMUs are ranked according to their super-efficiency score. The applicability of the proposed model is illustrated in the context of the analysis of gas companies performance