Alternative Technical Efficiency Measures: Skew, Bias, and Scale
Alternative Technical Efficiency Measures: Skew, Bias, and Scale
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替代技术效率措施：偏斜、偏差和规模
DOI：
10.2139/ssrn.1807145
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
W. Horrace
中科院分区：
文献类型：
--
作者：
Qu Feng;W. Horrace
在固定效应随机前沿模型中，普遍采用相对于样本中最佳企业的效率测度。本文考虑了一个新的措施相对于最差的公司在样本中。我们发现，当样本由许多公司组成时，这种措施的估计比传统的措施有更小的偏差有效边界附近。此外，一个双边措施相对于最好的和最差的公司提出。模拟结果表明，新的措施可能是首选取决于效率低下的分布和规模的效率差异的偏度。
In the fixed-effects stochastic frontier model an efficiency measure relative to the best firm in the sample is universally employed. This paper considers a new measure relative to the worst firm in the sample. We find that estimates of this measure have smaller bias than those of the traditional measure when the sample consists of many firms near the efficient frontier. Moreover, a two-sided measure relative to both the best and the worst firms is proposed. Simulations suggest that the new measures may be preferred depending on the skewness of the inefficiency distribution and the scale of efficiency differences.