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Productivity Changes by Public Transport Reforms in the Seoul's Urban Bus Industry (Using Data Envelopment Analysis with Consideration of Accident Costs)  

Oh, Mi-Young (서울시립대학교 교통공학과)
Kim, Sung-Soo (서울대학교 환경대학원)
Publication Information
Journal of Korean Society of Transportation / v.26, no.4, 2008 , pp. 77-86 More about this Journal
Abstract
Firstly, this study is to compare two types of productivity changes in Seoul's urban bus industry by public transport reforms: one with considering accident costs (ML), the other without considering accident costs (M). The directional distance function (DDF), which is a form of data envelopment analysis, and the Malmquist (Luenberger) productivity index (ML, M) are used for the analysis. The results show that productivity increased regardless of accident costs over time, and the ML index is a little higher than the M index, which means that most firms experienced more of a reduction ratio of accident costs than a reduction ratio of inputs. Secondly, this paper is to analyze how reforms affect productivity changes. The results show that operational speed improvements or passenger increases most affect productivity increases, which means that the installment of median bus lanes or introduction of free transfers among public transport modes were effective in reducing both inputs and accident costs. However, operational system reforms including mid-public management were related with productivity changes but they were not as effective.
Keywords
public transport reforms; urban bus firms; accident costs; data envelopment analysis; directional distance function; productivity changes; Malmquist-Luenberger productivity index;
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Times Cited By KSCI : 1  (Citation Analysis)
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