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dc.contributor.authorBarnum, Darold T.
dc.contributor.authorGleason, John M.
dc.date.accessioned2012-03-02T20:04:57Z
dc.date.available2012-03-02T20:04:57Z
dc.date.issued2011-06
dc.identifier.bibliographicCitationBarnum, D. T. & Gleason, J. M. 2011. Measuring efficiency under fixed proportion technologies. Journal of Productivity Analysis, 35(3): 243-262. DOI: 10.1007/s11123-010-0194-yen
dc.identifier.issn0895-562X
dc.identifier.otherDOI: 10.1007/s11123-010-0194-y
dc.identifier.urihttp://hdl.handle.net/10027/8153
dc.descriptionPost print version of article may differ from published version. The original publication is available at springerlink.com; DOI: 10.1007/s11123-010-0194-y.en
dc.description.abstractData Envelopment Analysis (DEA) applications frequently involve nonsubstitutable inputs and nonsubstitutable outputs (that is, fixed proportion technologies). However, DEA theory requires substitutability. In this paper, we illustrate the consequences of nonsubstitutability on DEA efficiency estimates, and we develop new efficiency indicators that are similar to those of conventional DEA models except that they require nonsubstitutability. Then, using simulated and real-world datasets that encompass fixed proportion technologies, we compare DEA efficiency estimates with those of the new indicators. The examples demonstrate that DEA efficiency estimates are biased when inputs and outputs are nonsubstitutable. The degree of bias varies considerably among Decision Making Units, resulting in substantial differences in efficiency rankings between DEA and the new measures. And, over 90 percent of the units that DEA identifies as efficient are, in truth, not efficient. We conclude that when inputs and outputs are not substituted for either technological or socio-economic/legal reasons, conventional DEA models should be replaced with models that account for nonsubstitutability.en
dc.language.isoen_USen
dc.publisherSpringer Verlagen
dc.subjectFixed proportion technologyen
dc.subjectData Envelopment Analysisen
dc.subjectEfficiency measurementen
dc.subjectNonsubstitutable inputsen
dc.subjectNonsubstitutable outputsen
dc.titleMeasuring Efficiency under Fixed Proportion Technologiesen
dc.typeArticleen


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