Regulation and Measuring Cost-Efficiency with Panel Data Models: Application to Electricity Distribution Utilities

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Efficiency Measurement in Network Industries: Application to the Swiss Railway Companies (2004, methodology): “For instance, as shown by Farsi and Filippini (2004) for the case of electricity networks, the regulator could use these models to predict a confidence interval for the costs of each one of the firms.”
Application of Panel Data Models in Benchmarking Analysis of the Electricity Distribution Sector (2006, unknown): “This specification is similar to that used in Farsi and Filippini (2004) with the only difference that here we excluded two explanatory variables whose effects proved to be statistically”
Efficiency analysis of German electricity distribution utilities – non-parametric and parametric tests (2006, background): “Using panel data of 59 Swiss distribution companies over eight years, Farsi and Filippini ( 2004 ) argue that different methodologies may lead to different results, but that the reasonable out-of-sample ‘prediction errors suggest that panel data models can be used as a prediction instrument in order”