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Preservation of efficiency and inefficiency classification in data envelopment analysis

Sufficient conditions for simultaneous efficiency preservation of all efficient Decision Making Units (DMUs) and for inefficiency preservation of all inefficient DMUs in the Additive model of Data Envelopment Analysis (DEA) under the simultaneous non-negative perturbations of all data of all DMUs are obtained. An illustrative example is provided.

Data envelopment analysis; efficiency; additive model; preservation of efficiency and inefficiency classification; sensitivity analysis; linear programming

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