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Memorandum, Department of Economics, University of Oslo >
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http://hdl.handle.net/10419/47286
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| Title: | | A note on imposing strong complementary in DEA  |
| Authors: | | Krivonozhko, Vladimir Førsund, Finn R. Lychev, Andrey V. |
| Issue Date: | | 2010 |
| Series/Report no.: | | Memorandum // Department of Economics, University of Oslo 2010,17 |
| Abstract: | | A new DEA model has been introduced recently combining the primal and the dual models in order to impose strong complementary slackness conditions. It was claimed that a reference set that contains the maximum number of efficient units can then be determined. The model is very interesting as a theoretical idea. However, not only does the computational burden increase significantly, but it seems also that the basic matrices may be inherently ill-conditioned, leading to wrong results. Numerical experiments have been carried out on two real datasets of medium size with 163 and 920 units. These experiments show pervasive existence of ill-conditioned matrices leading to obviously wrong estimates of efficiency scores, and units declared as efficient reference units while actually being inefficient. |
| Subjects: | | Data envelopment analysis BCC model DEA/SCSC model strong complementary slackness conditions |
| JEL: | | C61 D20 |
| Document Type: | | Working Paper |
| Appears in Collections: | | Memorandum, Department of Economics, University of Oslo
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