# Christopher Knittel Back to [[Authors/@BjornLomborg/People/People|Lomborg People]] · [[Authors/@BjornLomborg/BjornLomborg-x-profile|@BjornLomborg]] · Topic: [[Topics/Climate Change Science and Policy Debate/Climate Change Science and Policy Debate|Climate Change Science and Policy Debate]] **Role:** Energy economist; George P. Shultz Professor, MIT Sloan; director of MIT CEEPR and the MIT Climate Policy Center (per the paper's author note, Dec 2025) - Co-author, with Fischer J. Espiritu Argosino, of "Renewables and Electricity Affordability: Untangling Correlation from Causation", MIT CEEPR Working Paper 2025‑22 (Dec 1, 2025). It is not peer-reviewed; CEEPR's cover page says working papers are posted without a selection process. - Key finding (verbatim from the abstract): "once both state and year effects are included, the association between RPS stringency and retail electricity prices disappears, suggesting that the raw correlation is not causal. Utility-scale wind and solar generation are, if anything, weakly associated with lower prices." Rooftop solar remains positively associated with rates, which the authors attribute to cost recovery in tariff design. - It is the main counter-evidence in [[Authors/@BjornLomborg/Post Analyses/Post Analysis - BjornLomborg on The Cheap Green Lie Chart (2026-10-25)|The Cheap Green Lie Chart]].