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首页> 外文期刊>The International Journal of Productivity and performance management >A transformed fixed effect stochastic frontier approach for productivity evaluation in Indian electricity sector
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A transformed fixed effect stochastic frontier approach for productivity evaluation in Indian electricity sector

机译：一种用于印度电力部门生产率评估的固定效应随机前沿变换方法

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Purpose - The purpose of this paper is to evaluate the utility-level productivity changes in Indian electricity sector during a period that witnessed structural reforms through several landmark regulatory changes. Design/methodology/approach - A transformed fixed-effect stochastic frontier panel approach accounting for time-invariant unobserved heterogeneity is employed to evaluate the productivity changes, and the inefficiency level in 98 utilities spanning over the years 2001-2010. A flexible translog production model is modeled and estimated, and decomposition of productivity into components of changes in efficiency, scale technology and price effect is computed. Findings - The empirical findings obtained from the present study suggest that the utility-level productivity in Indian electricity sector has generally declined during the observed period of 2001-2010 specifically after the implementation of Electricity Act 2003. Also, it is estimated that the state-level un-bundling of the electricity sector is not significantly associated with utility-level efficiency change. Furthermore, efficiency improvements attributable to increased competition are observed only in the case of smaller gas-based generating utilities. Originality/value - Earlier studies on the productivity evaluation of Indian electricity industry have applied the non-parametric data envelopment analysis approach, which has several limitations. The novelty of the paper lies in the fact that this paper is one of the first attempts that implement transformed fixed-effect stochastic frontier panel approach and thus disentangle unobserved heterogeneity from inefficiency. Furthermore, it is the only paper that analyzes 98 utilities (51 generating utilities, 38 transmission and distribution licensees and 9 vertically integrated utilities) in a single framework during the period 2001-2010.
机译：目的-本文的目的是评估印度电力行业的公用事业水平生产率变化，在此期间，通过几次具有里程碑意义的监管变化见证了结构性改革。设计/方法/方法-考虑时间不变的未观察到的异质性的一种经过变换的固定效应随机前沿面板方法用于评估生产率的变化，以及2001-2010年间98家公用事业公司的低效率水平。对灵活的超量生产模型进行建模和估算，并将生产率分解为效率，规模技术和价格效应变化的组成部分。调查结果-从本研究获得的经验结果表明，在2001-2010年的观察期内，特别是在实施2003年《电力法》之后，印度电力行业的公用事业水平的生产率普遍下降了。而且，据估计，印度电力部门的级别解绑与公用事业级别的效率变化没有显着关联。此外，仅在较小的基于气体的发电设施的情况下，才观察到归因于竞争加剧的效率提高。原创性/价值-印度电力行业生产率评估的早期研究采用了非参数数据包络分析方法，该方法存在一些局限性。该论文的新颖性在于，该论文是实施固定不变的变换前沿边界方法的第一个尝试，因此可以将未观察到的异质性与效率低下区分开。此外，这是唯一一篇在2001-2010年期间在一个框架内分析98个公用事业（51个发电公用事业，38个输配电分销商和9个垂直整合公用事业）的论文。

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