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Ownership Unbundling of Electricity Distribution Networks

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  • Paul Nillesen and Michael Pollitt

Abstract

Traditional restructuring of power markets has focused on legally separating monopolistic transmission and distribution infrastructure with sufficient regulatory oversight to ensure non-discriminatory access to networks, and transparent and cost-reflective tariffs. There is consensus that ownership separation for transmission assets is beneficial for competition and transparency. However, at the distribution level the benefits of going beyond legal unbundling are questionable. This paper reviews the theoretical arguments for ownership unbundling and summarises the findings from 23 academic papers and consulting reports. In addition, this paper empirically demonstrates that forced distribution ownership unbundling in New Zealand (from 1998) and the Netherlands (from 2009) did not increase retail competition and did not increase network quality. It resulted in significant one-off and structural costs. The combination of increasingly active distribution networks with bi-directional power flows from distributed renewables, in combination with the digitalisation of energy supply and creation of distribution data platforms, suggests that interaction between networks and customers, traditionally separated from a regulatory and competition perspective may become more interlinked in future. Policymakers should therefore assess a broader set of policy measures, taking into account this changing network landscape, when focusing on increasing retail competition and network quality.

Suggested Citation

  • Paul Nillesen and Michael Pollitt, 2021. "Ownership Unbundling of Electricity Distribution Networks," Economics of Energy & Environmental Policy, International Association for Energy Economics, vol. 0(Number 1).
    • Handle: RePEc:aen:eeepjl:eeep10-1-nillesen
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    References listed on IDEAS

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    2. Paul Nillesen & Michael Pollitt, 2011. "Ownership Unbundling in Electricity Distribution: Empirical Evidence from New Zealand," Review of Industrial Organization, Springer;The Industrial Organization Society, vol. 38(1), pages 61-93, January.
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    Cited by:

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    2. Pedro H. Perico E Santos & Olivier Massol, 2022. "Electricity Distribution Systems in Europe : An Overview of Contemporary Regulatory Challenges," Working Papers hal-03897936, HAL.
    3. Rabindra Nepal & John Foster & Antonio Carvalho, 2014. "Revisiting Electricity Liberalization and Security of Supply: Empirical Evidence," Energy Economics and Management Group Working Papers 7-2014, School of Economics, University of Queensland, Australia.

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