The University of Cambridge Energy Policy Research Group (EPRG) and NERA Economic Consulting hosted the 2015 EPRG Winter Seminar in Cambridge on 10-11 December. This year's seminar focused on issues confronting energy producers, consumers, policymakers, and regulators pertaining to the role of markets and policy in energy transition. The conference began with a meal and keynote address in a Cambridge college on the evening of 10 December, followed by presentations from NERA, academic, and industry experts on 11 December.