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A spatial stochastic frontier model with omitted variables : electricity distribution in Norway.

Orea, L. and Álvarez, I.C. and Jamasb, T. (2018) 'A spatial stochastic frontier model with omitted variables : electricity distribution in Norway.', Energy journal., 39 (3). pp. 93-116.


An important methodological issue in efficiency analysis for incentive regulation of utilities is how to account for the effect of unobserved cost drivers such as environmental factors. We combine a spatial econometric approach with stochastic frontier analysis to control for unobserved environmental conditions when measuring efficiency of electricity distribution utilities. Our empirical strategy relies on the geographic location of firms as a source of information that has previously not been explored in the literature. The underlying idea is to utilise data from neighbouring firms that can be spatially correlated as proxies for unobserved cost drivers. We illustrate this approach using a dataset of Norwegian distribution utilities for the 2004-2011 period. We show that the lack of information on weather and geographic conditions can be compensated with data from surrounding firms. The methodology can be used in efficiency analysis and regulation of other utilities sectors where unobservable cost drivers are important, e.g. gas, water, agriculture, fishing.

Item Type:Article
Full text:Publisher-imposed embargo until 01 May 2021.
(AM) Accepted Manuscript
First Live Deposit - 05 December 2017
File format - PDF
Publisher Web site:
Record Created:05 Dec 2017 09:28
Last Modified:28 Jun 2018 09:47

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