Dr. Clarke is a Senior Research Economist at the Pacific Northwest National Laboratory (PNNL), and he is a staff member of the Joint Global Change Research Institute (JGCRI), a collaboration between PNNL and the University of Maryland at College Park. Dr. Clarke’s current research focuses on the role of technology in addressing climate change, scenario analysis, and integrated assessment model development. Dr. Clarke coordinated the U.S. Climate Change Science Program’s emissions scenario development process, and he was a contributing author on the Working Group III contribution to the IPCC’s Fourth Assessment Report. Prior to joining PNNL, Dr. Clarke worked for RCG/Hagler, Bailly, Inc. (1990-1992), Pacific Gas & Electric Company (1992-1996), and Lawrence Livermore National Laboratory (2002-2003). He was also a research assistant at Stanford’s Energy Modeling Forum (1999-2002), where he worked on issues related to technological change and integrated assessment modeling. Dr. Clarke received B.S. and M.S. degrees in Mechanical Engineering from U.C. Berkeley and M.S. and Ph.D. degrees in Engineering Economic Systems and Operations Research at Stanford University.