On classifying inputs and outputs in DEA: A revised model |
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Authors: | Mehdi Toloo |
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Institution: | Department of Mathematics, Islamic Azad University of Central Tehran, Tehran, Iran |
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Abstract: | Cook and Zhu Cook, W.D., Zhu, J., 2007. Classifying inputs and outputs in data envelopment analysis. European Journal of Operational Research 180, 692–699] introduced a new method to determine whether a measure is an input or an output. In practice, however, their method may produce incorrect efficiency scores due to a computational problem as result of introducing a large positive number to the model. This note introduces a revised model that does not need such a large positive number. |
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Keywords: | Data envelopment analysis Variable status Flexible inputs Flexible outputs Efficiency Computational error |
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