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A Day in the Life of a PhD Student in Sustainability Economics Eugenio Parigi is a PhD student at CREST and affiliated with École polytechnique. His research explores the intersection of sustainability, economics, and finance through two complementary projects. Finance and Service Quality His first project examines the impact of private equity ownership in the childcare sector. The goal is to determine whether these financial actors improve service...

Can biogas subsidies actually increase emissions? Biogas is often presented as an obvious solution for reducing CO₂ emissions. Yet, behind this seemingly efficient renewable energy source lie largely overlooked indirect effects. To stimulate biogas production, governments implement subsidies. In some countries where these incentives can be combined, producers may respond by increasing their production, sometimes by developing high-emission...

The 4th edition of the E4C Summer School From June 22 to 26, 2026, the E4C Center will host a new edition of its Summer School entitled “Green IT.” A program for diverse profiles The program is open to students from Master’s level to PhD and postdoctoral levels. Around thirty spots are reserved for them. Around ten additional spots will also be available à la carte for more industry-oriented profiles. A rich and high-quality program The Green IT –...