Jun.-Prof. Dr. Oliver Ruhnau is Assistant Professor of Energy Market Design at the University of Cologne and Research Scientist at the Institute for Energy Economics (EWI). His research interests lie in the field of energy economics and the sustainable transition of energy systems. In his dissertation, he investigated flexible electricity demand in current and future electricity markets, with a focus on heat pumps and hydrogen electrolysis. More recently, he studied natural gas savings in Germany during the energy crisis. He has (co-)developed several numerical energy market models and applies statistical methods for causal inference. Previously, he was a PhD Candidate and Postdoctoral Researcher at the Hertie School in Berlin. He worked as a Data Scientist in the energy industry and studied engineering and economics at the RWTH Aachen University and the KTH Royal Institute of Technology in Stockholm.