Andreas W. Schäfer is a professor of energy and transport at the UCL Energy Institute, University College London, where he directs the Air Transportation Systems Laboratory. Schäfer’s publications cover the demand for and supply characteristics of energy and transportation systems. Examples include econometric models of national, world-regional, and global travel demand, techno-economic assessments of advanced surface and air vehicle technologies, and integrated modelling of the global air transportation system. Prior to joining the UCL Energy Institute, he held appointments at the International Institute for Applied Systems Analysis (IIASA), Massachusetts Institute of Technology, the University of Cambridge, and Stanford University. Schäfer holds a master’s degree in aerospace engineering and a PhD in energy economics, both from the University of Stuttgart, Germany.