Divestiture Policy and Operating Efficiency in U.S. Electric Power Distribution

University of Cambridge, Electricity Policy Research Group / by John Kwoka, Sanem Ozturk and Michael Pollitt
http://www.electricitypolicy.org.uk/pubs/wp/eprg0819.pdf

[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. (RePEC)

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