Mark Alan Hughes is a Distinguished Senior Fellow of the University of Pennsylvania’s School of Design and the TC Chan Center for Building Simulation and Energy Studies. He is also Associate Director for Policy, Markets & Behavior at the DOE’s Energy Efficient Buildings Hub at the Philadelphia Navy Yard, a Faculty Fellow of the Penn Institute for Urban Research, a Senior Fellow of the Wharton School’s Initiative for Global Environmental Leadership, and a Scholar in Residence at Penn’s Fox Leadership Program. He has been a senior fellow at the Brookings Institution, the Urban Institute, and a senior adviser at the Ford Foundation. He was the Chief Policy Adviser to Mayor Michael Nutter and the founding Director of Sustainability for the City of Philadelphia. Hughes graduated from Swarthmore College in 1981, received a Ph.D. in Regional Science from Penn, joined the Princeton faculty in 1986 at the age of 25, has taught at Penn since 1999, and is widely published in the leading academic journals of several disciplines, including Economic Geography, Urban Economics, Policy Analysis and Management, and the Journal of the American Planning Association, for which he won the National Planning Award.