Sonar (Perplexity): Professor Sir Dieter Helm is a British economist and Professor of Economic Policy at the University of Oxford, with an official fellowship in economics at New College, Oxford. He is known for his work on energy policy, climate change, biodiversity, water, agriculture, and natural capital.

According to the search results, Helm previously served as Independent Chair of the Natural Capital Committee, advising the UK government on the sustainable use of natural capital, until 2020. He was awarded a knighthood in the 2021 New Year Honours for services to the environment, energy, and utilities policy.

He has also advised UK and European governments on energy and environmental policy, including the UK government’s Cost of Energy Review in 2017 and work connected to the European Commission’s Energy Roadmap 2030. His books mentioned in the results include The Carbon Crunch, Natural Capital: Valuing the Planet, Net Zero: How We Stop Causing Climate Change, and Legacy: How to Build the Sustainable Economy.

In short, he is a prominent Oxford academic and policy expert focused on the economics of the environment, energy, and sustainability.

Gemini 3 Flash (Google): Sir Dieter Helm is a prominent British economist and academic who serves as the Professor of Economic Policy at the University of Oxford and a Fellow in Economics at New College, Oxford. Born in 1956, he has established himself as a leading authority on energy, utilities, and environmental policy.

His academic career at Oxford spans several decades. He was appointed the university's Professor of Energy Policy in 1990, a role he held until 2007 when he transitioned to his current chair in Economic Policy. Beyond academia, Helm has been a significant advisor to both the UK government and the European Commission. Notably, he served as the Independent Chair of the Natural Capital Committee from 2012 to 2020, where he provided strategic advice on the sustainable use of natural assets. In 2017, he conducted the Cost of Energy Review for the UK government, which examined the efficiency of the electricity supply chain.

Helm is a prolific author known for his work on the transition to a sustainable economy. His notable books include The Carbon Crunch, Natural Capital: Valuing the Planet, Burn Out: The Endgame for Fossil Fuels, and Net Zero. His more recent work, Legacy: How to Build the Sustainable Economy, was published in 2023. His research often advocates for market-based solutions to climate change, such as carbon taxes, while emphasizing the importance of maintaining infrastructure and natural assets for future generations.

In recognition of his contributions to the environment, energy, and utilities policy, he was awarded a knighthood in the 2021 New Year Honours. He also co-founded Oxford Economic Research Associates (OXERA) and Aurora Energy Research, further bridging the gap between academic theory and industrial application.

GPT-5 Mini (OpenAI): Sir Dieter Helm is a British economist specialising in energy, environmental and utility policy. He is Professor of Economic Policy at the University of Oxford and a Fellow in Economics at New College, Oxford. (economics.ox.ac.uk)

His research and public-policy work focus on energy markets, climate policy, natural capital and the economics of infrastructure and regulation. He chaired the UK’s Natural Capital Committee (independent advisory body) and led the UK government’s 2017 Cost of Energy Review. (cambridge.org)

Helm is a prolific author and public commentator on climate and energy. Major books include The Carbon Crunch (2012), Burn Out (2017), Natural Capital (2015) and Net Zero (2020), the latter of which critiques current net‑zero strategies and was shortlisted for the Wainwright Prize. He frequently contributes to media and parliamentary evidence on energy and climate policy. (en.wikipedia.org)

Honours include being appointed Commander of the Order of the British Empire (CBE) earlier in his career and being knighted in the 2021 New Year Honours for services to the environment, energy and utilities policy. (en.wikipedia.org)

If you want, I can: (a) list his most important papers and where to find them, (b) summarize the arguments of Net Zero or The Carbon Crunch, or (c pull recent media appearances or commentary (e.g., since 2024). Which would you like?