Shift Key with Robinson Meyer The Outdated Economics Driving Trump’s Car Standards Rollback
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Feb 20, 2026 Kenneth Gillingham, Yale professor of environmental and energy economics who studies vehicle efficiency and regulation, and Hannah Hess, Associate Director at the Rhodium Group tracking clean investment trends. They discuss the economic assumptions behind the Trump rollback of fuel-economy rules and how economists now value fuel savings. They also cover Q4 2025 clean investment shifts, EV and battery project cuts, and strength in solar and storage.
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Assumed Full Consumer Valuation Cuts Policy Rationale
- The administration assumes consumers fully value future fuel savings when buying cars.
- If true, that would eliminate one major justification for fuel-economy standards.
Historical Energy‑Efficiency Gap Explained
- Historical consensus held consumers only valued ~2.5–3 years of a car's future fuel savings.
- That undervaluation (the energy-efficiency gap) motivated longstanding fuel-economy regulation.
Literature Swing And Methodology Matters
- Mid‑2010s research suggested consumers value nearly all future fuel savings, weakening the case for standards.
- Newer studies and corrected methods have shifted results back toward significant undervaluation.