Browsing by Subject "Data envelopment analysis"
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Item Open Access International regulations and environmental performance(Routledge, 2008) Yörük, B. K.; Zaim, O.This article employs the data envelopment analysis (DEA) approach to compute the environmental performance of all but two Organisation for Economic Co-operation and Development (OECD) countries. It is found that although the environmental performance of countries differs over time, Poland and Hungary are the two best performers for all periods while Italy, Japan, Austria and Switzerland are ranked among the worst. The effect of international regulations and some observed characteristics of countries on environmental performance are also investigated. International regulations are reported to have a positive effect on environmental performance.Item Open Access Measuring and evaluating efficiency of hospitals through total quality management: a multi-criteria data envelopment analysis model(Routledge, 2007) Zaim, S.; Bayyurt, N.; Turkyilmaz, A.; Solakoglu, N.; Zaim, H.The purpose of this study is to measure and evaluate the efficiency of 12 hospitals in Turkey using a multi-criteria Data Envelopment Analysis (DEA) methodology. Number of beds, number of physicians and the critical factors of total quality management in the health care sector were used as inputs of the model. The outputs used in this analysis incorporated financial and non-financial performance of hospitals, number of outpatients and number of patient days. Performance of the hospitals was measured using subjective measures based on executive's perception of how their organization performed relative to the competition. Results provide management with information regarding the relatively best practice hospitals in the observation sets and locate the relatively inefficient hospitals by comparison with the best practice ones. At last some suggestions are made for the least efficient hospital.Item Open Access Measuring environmental performance of state manufacturing through changes in pollution intensities: a DEA framework(Elsevier BV, 2004) Zaim, O.In decomposing the total emissions into scale and pollution intensity, the conventional approach uses the total output as a measure of scale, and hence ignores the fact that pollution is mainly a byproduct of the manufacturing activity. This study recognizing that air pollution is mainly a byproduct of manufacturing activity proposes a new definition of pollution intensity-pollution per unit of manufacturing output-, and a new technique to measure the aggregate pollution intensity. The index used is a variant of Malmquist quantity index and satisfies well-established axiomatic properties. One other focal point of this study is the overtime comparisons of pollution intensities, i.e., change in pollution intensity, using indexes that are firmly established in productivity growth literature. (C) 2003 Elsevier B.V. All rights reserved.