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- Title
A two-phase modified slack-based measure approach for efficiency measurement and target setting in data envelopment analysis with negative data.
- Authors
Matin, Reza Kazemi; Ghahfarokhi, Mina Izadi
- Abstract
Conventional data envelopment analysis models have been introduced for technologies only with non-negative inputs and outputs. But in real-world applications, we have some outputs and/or inputs which can take negative values. Especially, in some cases both positive and negative data appear simultaneously in output/input data. In this paper, we review and compare the most recent approaches introduced in the literature. Then, with recourse to some numerical examples, we show that present approaches may fail under two main categories in performance analysis: (a) in introducing non-negative efficient targets in the Pareto sense and (b) in introducing a complete efficiency score for the units. Subsequently, we propose a two-phase slack-based measure model which tackles both problems in an aggregated model. An empirical application in banking is used to illustrate the approach.
- Subjects
MEASURE theory; DATA envelopment analysis; DATA analysis; NUMERICAL analysis; CATEGORIES (Mathematics)
- Publication
IMA Journal of Management Mathematics, 2015, Vol 26, Issue 1, p83
- ISSN
1471-678X
- Publication type
Article
- DOI
10.1093/imaman/dpt025