Journal
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
Volume 274, Issue 1, Pages 240-252Publisher
ELSEVIER
DOI: 10.1016/j.ejor.2018.10.007
Keywords
Data envelopment analysis; Stochastic frontier analysis; Efficiency analysis; Regulation; Network operators
Funding
- Collaborative Research Center Statistical Modeling of Nonlinear Dynamic Processes of the German Research Foundation (DFG) [SFB 823]
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Data envelopment analysis (DEA) and stochastic frontier analysis (SFA), as well as combinations thereof, are widely applied in incentive regulation practice, where the assessment of efficiency plays a major role in regulation design and benchmarking. Using a Monte Carlo simulation experiment, this paper compares the performance of six alternative methods commonly applied by regulators. Our results demonstrate that combination approaches, such as taking the maximum or the mean over DEA and SFA efficiency scores, have certain practical merits and might offer a useful alternative to strict reliance on a singular method. In particular, the results highlight that taking the maximum not only minimizes the risk of underestimation, but can also improve the precision of efficiency estimation. Based on our results, we give recommendations for the estimation of individual efficiencies for regulation purposes and beyond. (C) 2018 Elsevier B.V. All rights reserved.
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