Energy Policy Vol. 30, Pages 465-469 2002 ÌÇÐÄvlog¹ÙÍø Authors See citation below for complete author information. John Holdren Teresa and John Heinz Research Professor of Environmental Policy Citation Sagar, Ambuj D., and John P. Holdren. "Assessing the Global Energy Innovation System: Some Key Issues." Energy Policy 30 (2002): 465-469.