Portrait of Leon Fields

Leon Fields Senior Consultant

Leon’s areas of expertise include market design, competition policy and the economic regulation of utilities. He is a member of the Regulation and Water teams at Oxera, and has particular expertise in incentive regulation, behavioural economics and industrial organisation. He is a member of Oxera’s Content Hub, and has been actively involved in Oxera’s Agenda publication since its launch.

Leon has in-depth knowledge of the water sector, having been actively involved in all aspects of the 1999, 2004, 2009, 2014, 2019 and 2024 periodic reviews. Across utility sectors, he has detailed knowledge of incentive regulation, regulatory reform and market reform. He has worked for several small-island jurisdictions on regulatory change.

Leon has also undertaken a number of projects on consumer behaviour, firm behaviour and market design. He is an expert in water tariff design, and in how the objectives of cost recovery, efficiency and compliance can be balanced. He has also undertaken water infrastructure option appraisal for a variety of clients.

Leon speaks English.

Tel: +44 (0) 1865 253014

Leon's specialisms include:

Selected
professional experience

  • Project managing a team advising South West Water on various PR24 regulation issues (2020–)

  • Led and provided economic regulation training to South West Water (2020–23)

  • Expert adviser on the economics of renewals for a European transport organisation (2023)

  • Advice to the Home Office on introducing a charge control for emergency mobile radio network services (2022–23)

  • Project managed the Oxera team in the Pennon–Bristol CMA merger inquiry, including in relation to performance commitments (2021–22)

  • Project manager in exploring the role of benchmarking for a European transport organisation (2021)

Selected
publications

  • Niels, G., Dijk, R. van and Fields, L. (2013), ‘Behavioural economics and its impact on competition policy: A practical assessment’, Competition Law Journal, 12:3, pp. 374–84.

  • Fields, L., Horncastle, A. and Noble, R. (2009), ‘Water competition and the Cave Review: a clear way forward?’, Competition Law Journal, 8:3, pp. 238–47.

Qualifications

  • MSc Economics, University of Warwick

  • BSc Economics, University of Warwick


Download Full CV

Latest Insights:  Leon Fields

Agenda
3 minute read
Depiction of The future funding of the England & Wales water sector: Ofwat’s draft determinations

The future funding of the England & Wales water sector: Ofwat’s draft determinations

On Thursday 11 July, Ofwat (the England and Wales water regulator) published its much anticipated Draft Determinations (DDs). As part of the PR24 price review, this sets out its provisional…
Agenda
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Depiction of Understanding and influencing behaviour: economics vs science

Understanding and influencing behaviour: economics vs science

Have you heard the terms behavioural science and behavioural economics floating around? Individuals, corporations and governments are turning to both in the quest to understand and change human behaviour—but does…
Agenda
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Depiction of Who doesn’t invest and why? A behavioural data science perspective

Who doesn’t invest and why? A behavioural data science perspective

As we adjust to a high inflation environment, those who are fortunate enough to have savings are seeing their purchasing power erode by up to 10% per year. In the…
Agenda
7 minute read
Depiction of Interminable: who can read T&Cs?

Interminable: who can read T&Cs?

Many products form a contract between a firm and a customer, the details of which are specified in the terms and conditions (T&Cs). But do customers always understand what they…
Courses

Utility regulation and finance: Principles of economic regulation

Over the course of more than 40 years, Oxera has developed and run training courses to help companies, regulators, investors, policymakers and lawyers to develop their knowledge of economic regulation and understand the key building blocks of a price review. The decisions that economic regulators make shape the revenues that… Read More

Image depicting Utility regulation and finance: Principles of economic regulation

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