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A Statistical Test for Nested Radial Dea Models

Author

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  • Jesús T. Pastor

    (Centro de Investigación Operativa, Universidad Miguel Hernández, Avd. del Ferrocarril, s/n, 03202-Elche (Alicante), Spain)

  • JosÉ L. Ruiz

    (Centro de Investigación Operativa, Universidad Miguel Hernández, Avd. del Ferrocarril, s/n, 03202-Elche (Alicante), Spain)

  • Inmaculada Sirvent

    (Centro de Investigación Operativa, Universidad Miguel Hernández, Avd. del Ferrocarril, s/n, 03202-Elche (Alicante), Spain)

Abstract

Some problems in economics, operations research, and engineering may be approached by means of a pair of radial DEA models that are nested, i.e., that the set of constraints of one of them is included in that of the other. In this paper we have focused on analyzing the marginal role of a given variable, called candidate , with respect to the efficiency measured by means of a DEA model. First, we have defined a new efficiency contribution measure (ECM) , which finally compares the efficiency scores of the two radial DEA models differing in the candidate. This can be either one input or one output. Then,based on ECM, we have also approached the problem from a statistical point of view. To be precise, we have developed a statistical test that allows us to evaluate the significance of the observed efficiency contribution of the candidate. Eventually, solving this test may provide some useful insights in order to decide the incorporation or the deletion of a variable into/from a given DEA model, on the basis of the information supplied by the data. Two procedures for progressive selection of variables were designed by sequentially applying the test: a forward selection and a backward elimination. These can be very helpful in the initial selection of variables when building a radial DEA model.

Suggested Citation

  • Jesús T. Pastor & JosÉ L. Ruiz & Inmaculada Sirvent, 2002. "A Statistical Test for Nested Radial Dea Models," Operations Research, INFORMS, vol. 50(4), pages 728-735, August.
    • Handle: RePEc:inm:oropre:v:50:y:2002:i:4:p:728-735
    DOI: 10.1287/opre.50.4.728.2866
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    References listed on IDEAS

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