Advisory in energy and environmental economics, infrastructure finance and regulation.

Economist-grade analysis, built for decision-making.

Expertise built at the heart of Europe's largest energy projects.

Transitions.Earth was founded in 2020 by Jean-Baptiste Vaujour, an energy economist. As a financial analyst at EDF, he worked on the financing of the group's flagship projects — including Hinkley Point C — and on the structuring of the solar project that held the world record for the lowest cost of electricity for nearly a decade.

Previously a strategy analyst at Enedis focusing on the economics of distribution grids, he is now Senior Professor of Practice at emlyon business school, where he directs the Master in Strategy and Consulting and heads the Consulting and Sustainable Transformation practice, alongside his advisory work.

On high-stakes engagements, Transitions.Earth operates in consortium with partner consultancies: teams assembled to match the scale of the matter, without diluting the seniority of the work.

• Marcel Boiteux Prize 2015 — French Association of Energy Economists, for Économie de l'énergie (Dunod)
• Registered expert with the European Commission — energy infrastructure finance and decarbonisation
• Future Energy Leader — World Energy Council
• Author — Entreprise : objectif zéro carbone (ed., Dunod, 2023) · Dans l'urgence climatique (Folio/Gallimard, 2022)

More than twenty missions delivered since 2020, on sensitive and complex matters.

• Interconnection · Public institution Drafting the terms of reference, then selecting, leading and overseeing a 20+ strategy-consultant team to deliver the preliminary economic study for a major European electricity interconnector.
• Valuation · Investment fund Advising an investment fund on the valuation of a major European energy player in the context of its nationalisation.
• Distressed · Debt fund Supporting a debt fund through the nuclear production crisis affecting a major European energy operator.
• Offshore wind · Global strategy firm Supporting a world-leading strategy consultancy on a study of the European offshore wind market and its onshore grid connections.
• Price scenarios · International strategy firm Supporting an international strategy consultancy on European energy price scenarios in a context of crisis.
• Carbon policy · Think tanks & European Commission Conducting a 23-country study on carbon revenue recycling for a consortium of think tanks and the European Commission.
• Carbon strategy · European industry Advising a major European chemicals group on its carbon strategy.

Confidentiality is a working condition of the firm. Named references are available on request, with the consent of the clients concerned.

Reference works on the economics of the energy transition.

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Économie de l'énergie

With S. Méritet · Dunod, Les Topos · Marcel Boiteux Prize 2015

Dans l'urgence climatique

Folio / Gallimard, 2022 · Rethinking the energy transition

Entreprise : objectif zéro carbone

Editor · Dunod, 2023 · Keys to effective decarbonisation

Maximising benefits of carbon pricing through carbon revenue use

Report · I4CE, 2024 · contributor

Read the report →

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Selected writing on energy economics, finance and policy.

Recognised as an illuminem Top Voice, Jean-Baptiste Vaujour writes regularly on the economics of the energy transition — with work also featured in Knowledge@emlyon, Earth.Org and The International Consultant, among others.

• The challenge of a generation: decarbonising utilitiesilluminem · February 2025
• Why do you never hear 'carbon pricing' in Brussels anymore?EUobserver · October 2024
• Is carbon pricing becoming taboo?Euractiv · October 2024
• Who is controlling France's electricity?illuminem · October 2024
• The French nuclear conundrumilluminem · June 2024
• The rise of Carbon Capture and Storage (CCS)illuminem · November 2024

All articles on illuminem →

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The firm works in English and French, in France and internationally.