A new approach to the bi-dimensional representation of the DEA efficient frontier with multiple inputs and outputs

This paper presents a new approach to the graphical presentation of DEA results. Whatever the number of inputs and outputs are, an adequate normalization of their weights is enough to generate a simple bi-dimensional graph, similar to that of the CCR frontier with one input and one output. An advantage over other approaches to the same representation problem is that no complementary techniques are required to plot the frontier. It is also proved that the distance of a DMU to the frontier is related to its efficiency. The proposed approach is also valid for the BCC model.

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