Accounting for emissions in the measurement of transit agency efficiency: A directional distance function approach

McMullen, Β. Starr; Noh, Dong-Woon

doi:10.1016/j.trd.2006.10.001

Cited by 40 publications

(20 citation statements)

References 7 publications

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“…These studies commonly suggest that the results could be distorted without the consideration of undesirable outputs. Studies that have considered undesirable outputs include Lin and Lan [7] and McMullen and Noh [8].…”

Section: Literature Reviewmentioning

confidence: 99%

Productivity changes in consideration of accident costs in Seoul's bus industry

Oh¹,

Shon²,

Kim³

2011

J of Advced Transportation

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SUMMARYThe Seoul Metropolitan Government has introduced a quasi-public operational system since the public transport systems were reformed in July 2004. Thus, there has been controversy on moral hazards. A question addressed by researchers of transportation is the extent to which the public transport reforms have led to improvements in efficiency and productivity growth. The directional distance function and the Malmquist Luenberger Index, respectively, were used to investigate the impacts of public transport reforms on efficiency and productivity growth both with and without accident costs in Seoul's bus industry. The data cover 2003 and 2005; 2003 is the pre-reform year and 2005 is the post-reform year. It is found that the overall productivity increased a little regardless of the consideration of accident costs; it increased a little bit more in the presence of accident costs. This means that the overall productivity at least did not decrease and the level of service in terms of safety was improved following the public transport reforms.

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Section: Literature Reviewmentioning

confidence: 99%

Productivity changes in consideration of accident costs in Seoul's bus industry

Oh¹,

Shon²,

Kim³

2011

J of Advced Transportation

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“…As mentioned above, sometimes these goals are in conflict. One way to try and compare different systems and their collective efficiency in attaining multiple goals, is through the use of a non-parametric approach such as that used by Nolan et al (2002) and McMullen and Noh (2007) to provide rankings for the efficiency of bus transit systems throughout the U.S. These studies used variants of data envelope analysis (DEA) to incorporate multiple goals and outputs into the measure of transit bus system efficiency.…”

Section: Overall System Efficiency Measurementmentioning

confidence: 99%

Freight Performance Measures: Approach Analysis

McMullen¹,

Monsere²

2010

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Sponsoring Agency Code Supplementary Notes AbstractThis report reviews the existing state of the art and also the state of the practice of freight performance measurement. Most performance measures at the state level have aimed at evaluating highway or transit infrastructure performance with an emphasis on passenger transportation. Freight performance measurement ultimately requires evaluation of performance of the entire freight transportation system, which includes highways, waterways, rail, air, and modal connections. This requires considerable expansion of thinking beyond the traditional focus of state Departments of Transportation (DOTs) on highway performance. This project builds upon past and current work in the area of freight performance measurement and incorporates recent literature on the development of these measures. A thorough review of state practices is conducted by surveying state DOT web sites and reporting on the measures most frequently recommended and used by individual states for planning purposes. The emphasis is on the application of performance measures to freight transportation, and the usefulness and limitations of these measures, is discussed.Recommendations are made for potential freight performance measures for each freight mode (air, rail, trucking, and water/marine), including initial information on data availability, validity, and feasibility given existing data for Oregon.Future research needs discussed include additional data collection and development required to support performance measures, what is needed to track system performance changes over time, and testing of measures for their sensitivity and usefulness for policy and decision-making.

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“…However, most studies have evaluated the efficiency of bus agencies using Data Envelopment Analysis (DEA), which Charnes et al (1978) developed, without considering undesirable outputs. Thus, this methodology ignores the possibility that transit agency resources might be devoted to the reduction of undesirable outputs (McMullen and Noh, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…DDF is an appropriate method of analysis regarding whether or not the objectives of bus transit agencies coincide with Seoul's objectives such as service improvement, management efficiency, and emissions reduction. Therefore, this paper follows the framework of McMullen and Noh (2007), which is very appropriate to analyze whether or not the objectives of Seoul's public reforms have been accomplished.…”

Section: Introductionmentioning

confidence: 99%

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Efficiency analysis of Seoul’s urban bus agencies considering emissions

Shon

Kim

et al. 2011

KSCE J Civ Eng

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The Seoul Government reformed local public transport systems in 2004 to reduce vehicle emissions as well as get bus transit agencies to operate more efficiently and improve bus service levels. In this study, using the directional distance function, the efficiency of bus transit agencies was examined both with and without the consideration of emissions to show the importance of public transportation reforms.The analysis included 59 Seoul urban bus transit agencies in June 2005. The results showed that the number of efficient agencies and the efficiency score rankings differed depending on whether or not emissions were considered. Meanwhile, contracted bus agencies that operated on tendered routes were found to be more efficient than the remainder, regardless of the reduction in emissions.

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Accounting for emissions in the measurement of transit agency efficiency: A directional distance function approach

Cited by 40 publications

References 7 publications

Productivity changes in consideration of accident costs in Seoul's bus industry

Productivity changes in consideration of accident costs in Seoul's bus industry

Freight Performance Measures: Approach Analysis

Efficiency analysis of Seoul’s urban bus agencies considering emissions

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