EPRG 0819

John Kwoka, Sanem Ozturk, Michael G Pollitt

Divestiture Policy and Operating Efficiency in US Electric Power Distribution

EPRG 0819 Non-Technical Summary | PDF

Also published in:

  • Kwoka, J., Pollitt, M. and Sergici, S. (2010) “Divestiture Policy and Operating Efficiency in U.S. Electric Power Distribution”, Journal of Regulatory Economics, Vol. 38 (1), pp.86-109

Abstract: This study examines the effects of divestiture policy on the operating efficiency of US distribution utilities. We focus on the decisive 1994-2003 period when state utility commissions required or pressured utilities to create standalone generation facilities, and thereby almost incidentally standalone distribution systems. The analytical foundation of this study is the measurement of the operating efficiency of 73 distribution units of major U.S. electric utilities in each of those ten years through the use of data envelopment analysis (DEA). Using this panel of data and controlling for other possible influences, we then evaluate the effects on measured efficiency from the divestitures that many of the utilities underwent during the study period. We find that while all divestitures as a group do not significantly affect distribution efficiency, those mandated by state public utility commissions have resulted in large and statistically significant adverse effects on efficiency.

Keywords: Divestiture, electricity distribution, efficiency analysis

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