APPLICATION OF PANEL DATA MODELS IN BENCHMARKING ANALYSIS OF THE ELECTRICITY DISTRIBUTION SECTOR

Mehdi Farsi, Massimo Filippini and William Greene

Annals of Public and Cooperative Economics, 2006, vol. 77, issue 3, 271-290

Abstract: ABSTRACT**: This paper explores the application of several panel data models in measuring productive efficiency of the electricity distribution sector. Stochastic Frontier Analysis has been used to estimate the cost‐efficiency of 59 distribution utilities operating over a nine‐year period in Switzerland. The estimated coefficients and inefficiency scores are compared across three different panel data models. The results indicate that individual efficiency estimates are sensitive to the econometric specification of unobserved firm‐specific heterogeneity. This paper shows that alternative panel models such as the ‘true’ random effects model proposed by Greene (2005) could be used to explore the possible impacts of unobserved firm‐specific factors on efficiency estimates. When these factors are specified as a separate stochastic term, the efficiency estimates are substantially higher suggesting that conventional models could confound efficiency differences with other unobserved variations among companies. On the other hand, refined specification of unobserved heterogeneity might lead to an underestimation of inefficiencies by mistaking potential persistent inefficiencies as external factors. Given that specification of inefficiency and heterogeneity relies on non‐testable assumptions, there is no conclusive evidence in favour of one or the other specification. However, this paper argues that alternative panel data models along with conventional estimators can be used to obtain approximate lower and upper bounds for companies' efficiency scores.

Date: 2006
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (63)

Downloads: (external link)
https://doi.org/10.1111/j.1467-8292.2006.00306.x

Related works:
Working Paper: Application of Panel Data Models in Benchmarking Analysis of the Electrivity Distribution Sector (2005)
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:bla:annpce:v:77:y:2006:i:3:p:271-290

Ordering information: This journal article can be ordered from
http://www.blackwell ... bs.asp?ref=1370-4788

Access Statistics for this article

Annals of Public and Cooperative Economics is currently edited by Marco Marini

More articles in Annals of Public and Cooperative Economics from Wiley Blackwell
Bibliographic data for series maintained by Wiley Content Delivery ().