His research focuses on the effectiveness and efficiency of comparative approaches to addressing environmental problems and the adoption and diffusion of energy technologies and policies. He currently is a fellow with the Brook Byers Institute for Sustainability, and is affiliated with the Strategic Energy Institute and Center for Urban Innovation. He has participated in over $4 million of sponsored research through the National Science Foundation, the European Union Center for Excellence, the German Academic Exchange Service, the Georgia Department of Transportation, and the National Electric Energy Testing Research and Applications Center