Undesirable factors in integer-valued DEA : evaluating the operational efficiencies of city bus systems considering safety records
In conventional data envelopment analysis (DEA) methods, all inputs and outputs are assumed to be continuous. However, in many practical situations, firms may generate both desirable and undesirable outputs, and some of which may only take integer values (e.g., the number of traffic accidents and de...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/97797 http://hdl.handle.net/10220/13204 |
| _version_ | 1811684060883320832 |
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| author | Du, Juan Huo, Jiazhen Zhu, Joe Chen, Chien-Ming |
| author2 | Nanyang Business School |
| author_facet | Nanyang Business School Du, Juan Huo, Jiazhen Zhu, Joe Chen, Chien-Ming |
| author_sort | Du, Juan |
| collection | NTU |
| description | In conventional data envelopment analysis (DEA) methods, all inputs and outputs are assumed to be continuous. However, in many practical situations, firms may generate both desirable and undesirable outputs, and some of which may only take integer values (e.g., the number of traffic accidents and deaths in a transportation system). The efficiency evaluation results can be inaccurate if these conditions are not incorporated in the model. In this paper we propose an integer DEA model with undesirable inputs and outputs. The proposed model is developed based on the additive DEA model, in which input and output slacks are used to compute efficiency scores. We also develop an integer super-efficiency model to discriminate the performance of efficient firms. As an illustration, we apply the proposed models to the longitudinal data from a city bus company in Taiwan. |
| first_indexed | 2024-10-01T04:22:38Z |
| format | Journal Article |
| id | ntu-10356/97797 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:22:38Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/977972023-05-19T06:44:40Z Undesirable factors in integer-valued DEA : evaluating the operational efficiencies of city bus systems considering safety records Du, Juan Huo, Jiazhen Zhu, Joe Chen, Chien-Ming Nanyang Business School In conventional data envelopment analysis (DEA) methods, all inputs and outputs are assumed to be continuous. However, in many practical situations, firms may generate both desirable and undesirable outputs, and some of which may only take integer values (e.g., the number of traffic accidents and deaths in a transportation system). The efficiency evaluation results can be inaccurate if these conditions are not incorporated in the model. In this paper we propose an integer DEA model with undesirable inputs and outputs. The proposed model is developed based on the additive DEA model, in which input and output slacks are used to compute efficiency scores. We also develop an integer super-efficiency model to discriminate the performance of efficient firms. As an illustration, we apply the proposed models to the longitudinal data from a city bus company in Taiwan. 2013-08-23T03:51:44Z 2019-12-06T19:46:51Z 2013-08-23T03:51:44Z 2019-12-06T19:46:51Z 2012 2012 Journal Article Chen, C. M., Du, J., Huo, J.,& Zhu, J. (2012). Undesirable factors in integer-valued DEA: Evaluating the operational efficiencies of city bus systems considering safety records. Decision Support Systems, 54(1), 330-335. https://hdl.handle.net/10356/97797 http://hdl.handle.net/10220/13204 10.1016/j.dss.2012.05.040 en Decision support systems |
| spellingShingle | Du, Juan Huo, Jiazhen Zhu, Joe Chen, Chien-Ming Undesirable factors in integer-valued DEA : evaluating the operational efficiencies of city bus systems considering safety records |
| title | Undesirable factors in integer-valued DEA : evaluating the operational efficiencies of city bus systems considering safety records |
| title_full | Undesirable factors in integer-valued DEA : evaluating the operational efficiencies of city bus systems considering safety records |
| title_fullStr | Undesirable factors in integer-valued DEA : evaluating the operational efficiencies of city bus systems considering safety records |
| title_full_unstemmed | Undesirable factors in integer-valued DEA : evaluating the operational efficiencies of city bus systems considering safety records |
| title_short | Undesirable factors in integer-valued DEA : evaluating the operational efficiencies of city bus systems considering safety records |
| title_sort | undesirable factors in integer valued dea evaluating the operational efficiencies of city bus systems considering safety records |
| url | https://hdl.handle.net/10356/97797 http://hdl.handle.net/10220/13204 |
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