Accounting for emissions in the measurement of transit agency efficiency: A directional distance function approach |
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| Institution: | 1. Division of Kidney and Dialysis, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan;2. Department of Internal Medicine, Musashi Ranzan Hospital, Ranzan, Japan;3. Department of Nephrology and Blood Purification, Saitama Medical Center, Saitama Medical University, Saitama, Japan;4. Division of Nephrology and Dialysis, Department of Cardiorenal and Cerebrovascular Medicine, Faculty of Medicine, Kagawa University, Kagawa, Japan;5. Division of Integrated Nephrology and Telemedicine, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan;6. Division of Nephrology and Rheumatology, Department of Internal Medicine, Faculty of Medicine, Fukuoka University, Fukuoka, Japan;7. Department of Nephrology, Kumamoto University, Graduate School of Medical Sciences, Kumamoto, Japan;8. Department of Hemovascular Medicine and Artificial Organs, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan;9. Department of Nephrology, Toho University, Ohashi Medical Center, Tokyo, Japan;10. Department of Internal Medicine, Yachiyo Hospital, Aichi, Japan;11. Department of Internal Medicine, Higashikouri Hospital, Higashikouri, Japan;12. Department of Internal Medicine, Itakura Clinic, Saitama, Japan |
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| Abstract: | This paper uses a directional distance function approach to demonstrate the importance of considering a transit agency’s goal of reducing vehicular emissions as well as production of passenger or vehicle-miles, when measuring agency efficiency. This is especially critical given the increased emphasis policymakers may place on efficiency in the allocation of scarce public resources. The analysis includes 43 single mode US bus transit agencies for the year 2000. Results show only five agencies performing efficiently when emission abatement is not included in the analysis, but 22 firms are identified as efficient once emission abatement is considered. Consistent with previous studies, public agencies are found to be less efficient than private agencies, regardless of the efficiency measure used. |
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