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Revisiting electricity liberalization and quality of service: empirical evidence from New Zealand

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  • Rabindra Nepal
  • Antonio Carvalho
  • John Foster

Abstract

What effect does the firm structure have on the quality of service delivered by networks and infrastructure industries? We answer this question by empirically assessing the impacts of complete vertical separation, such as ownership unbundling, on the quality of service delivered by a liberalized network industry. Electricity distribution utilities in New Zealand are considered for this purpose and are analysed using panel-data econometrics. The results show robust evidence that ownership unbundling contributed to a fall in the duration and frequency of supply interruptions in electricity distribution. However, the results also show that unbundling has no effect on reducing distribution network losses. These results, overall, highlight the nonsimple impacts of ownership unbundling on the quality of electricity distribution. We suggest that the quality of service may largely improve when considered in the economic regulation of electricity networks than completely relying on specific reform measures such as ownership unbundling.

Suggested Citation

  • Rabindra Nepal & Antonio Carvalho & John Foster, 2016. "Revisiting electricity liberalization and quality of service: empirical evidence from New Zealand," Applied Economics, Taylor & Francis Journals, vol. 48(25), pages 2309-2320, May.
    • Handle: RePEc:taf:applec:v:48:y:2016:i:25:p:2309-2320
    DOI: 10.1080/00036846.2015.1119789
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    References listed on IDEAS

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    1. Jeffrey M Wooldridge, 2010. "Econometric Analysis of Cross Section and Panel Data," MIT Press Books, The MIT Press, edition 2, volume 1, number 0262232588, April.
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    1. Bastianin, Andrea & Castelnovo, Paolo & Florio, Massimo, 2018. "Evaluating regulatory reform of network industries: a survey of empirical models based on categorical proxies," Utilities Policy, Elsevier, vol. 55(C), pages 115-128.
    2. Qazi, Usama & Jahanzaib, Mirza & Ahmad, Wasim & Hussain, Salman, 2017. "An institutional framework for the development of sustainable and competitive power market in Pakistan," Renewable and Sustainable Energy Reviews, Elsevier, vol. 70(C), pages 83-95.
    3. Ye He & Siming Guo & Yu Wang & Yujia Zhao & Weidong Zhu & Fangyuan Xu & Chun Sing Lai & Ahmed F. Zobaa, 2022. "An Agent-Based Bidding Simulation Framework to Recognize Monopoly Behavior in Power Markets," Energies, MDPI, vol. 16(1), pages 1-19, December.
    4. Summanen, Tuomo & Arminen, Heli, 2018. "Ownership unbundling in electricity distribution: The Russian experience," Energy, Elsevier, vol. 161(C), pages 1199-1210.
    5. Andrea Bastianin & Paolo Castelnovo & Massimo Florio, 2017. "The Empirics of Regulatory Reforms Proxied by Categorical Variables: Recent Findings and Methodological Issues," Working Papers 2017.22, Fondazione Eni Enrico Mattei.
    6. Valadkhani, Abbas & Nguyen, Jeremy & Smyth, Russell, 2018. "Consumer electricity and gas prices across Australian capital cities: Structural breaks, effects of policy reforms and interstate differences," Energy Economics, Elsevier, vol. 72(C), pages 365-375.

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