@techreport{oai:grips.repo.nii.ac.jp:00000955,
 author = {TONE, Kaoru},
 note = {https://www.grips.ac.jp/list/facultyinfo/tone_kaoru/, In this paper, we propose a new non-parametric DEA scheme for measuring efficiency in the presence of undesirable outputs, based on a slack-based measure(SBM) developed in Tone (2001). We further extend our scheme to cope with non-separable desirable and undesirable outputs. Then we compare our approach with some other methods proposed for this purpose thus far., Research supported by Grant-in-Aid for Scientific Research (C) Japan Society for the Promotion of Science},
 title = {Dealing with Undesirable Outputs in DEA: A Slacks-based Measure (SBM) Approach}
}