Technology Policy Innovation for 21st Century Freight Systems. Dr. Corbett has contributed groundbreaking research on air emissions from maritime transport, energy and environmental impacts of freight transportation, and assessment of technological and policy strategies for improving goods movement. Dr. Corbett received his Ph.D. in Engineering and Public Policy (EPP) from Carnegie Mellon University, where he also earned M.S. degrees in the departments of EPP and Mechanical Engineering. He is a graduate of the California Maritime Academy and he worked as a licensed officer in the U.S. Merchant Marine, a Naval Reserve Engineering Duty Officer, and a consultant for industry and government in industrial operations, energy and environmental performance.