Browsing by Author "Khan, Haider A."

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Accounting for air pollution emissions and transport policy in the measurement of the efficiency and effectiveness of bus transits
(2020-05-27)
Kang, Chao-Chung
;
Feng, Cheng-Min
;
Liao, Bo-Ruei
;
Khan, Haider A.
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運輸與物流管理系註：原交通所+運管所
This study presents a two-stage network performance evaluation model that determines the efficiency and effectiveness of bus transit systems. The model accounts for non-storable service features, undesirable outputs, and transport policy factors. The Taipei bus transit system is presented as an empirical case to measure the performance of bus transits with and without consideration of carbon dioxide (CO2) emissions and the transfer of riders. The results show that CO2 emissions and the transfer of riders are important factors for a performance evaluation model. Failure to include these results in an incomplete evaluation. Rather than focusing solely on marketable outputs, government agencies and managers must consider undesirable outputs or transport policy factors that relate to bus transits when measuring the efficiency and effectiveness of bus transits.
Efficiency evaluation of bus transit firms with and without consideration of environmental air-pollution emissions
(2017-01)
Kang, Chao-Chung
;
Khan, Haider A.
;
Feng, Cheng-Min
;
Wu, Chin-Chia
;
運輸與物流管理系註：原交通所+運管所
This study examines the technical efficiency and environmental efficiency of bus transit firms using the slack-based measures (SBM) and non-separable slack-based measures (NSSBM) models with and without considerations of desirable and undesirable outputs. A case study based on data from 12 bus transit firms for the years 2007 to 2011 was conducted. Empirical results show that technical efficiency was affected by environmental pollution constraints from 2007 to 2011. The study has more general theoretical implications for the externalities literature as well. (C) 2016 Elsevier Ltd. All rights reserved.