Incorporating water purification in efficiency evaluation: evidence from Japanese water utilities
Incorporating water purification in efficiency evaluation: evidence from Japanese water utilities
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DOI：
10.1080/13504851.2011.564119
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发表时间：
2011-01-01
影响因子：
1.6
通讯作者：
Horn, Theara
中科院分区：
文献类型：
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作者：
Horn, Theara
这项研究试图表明，将净水努力包括在内应该是效率衡量的另一个关键维度。我使用随机成本前沿(SCF)来估计2005年日本392家水务公司的技术效率。结果表明，净水努力可能会增加成本，将其纳入效率评估会导致效率得分和水公用事业排名的一些具体变化。此外，这种结合还可以控制不同水质的水源对效率的影响。结果表明，为了鼓励净水努力，将净水纳入基准是至关重要的。
This study attempts to show that the inclusion of water purification efforts should be another crucial dimension in the efficiency measurement. I use a Stochastic Cost Frontier (SCF) to estimate the technical efficiency of 392 Japanese water utilities in 2005. The results show that a water purification effort may increase cost, and that its inclusion in efficiency evaluation leads to some specific changes in efficiency score and the ranking of water utilities. Furthermore, this incorporation enables the impact of different qualities of source water on efficiency to be controlled. The result suggests that to encourage water purification efforts, it is crucial to incorporate purification in benchmarking.