Climate change policy can be complex, expensive to implement, and have unintended negative consequences on the environment. Focusing on the economics of transportation policy, Professor Christopher Knittel is working help create climate change policy that is more efficient and economically sustainable. In this Faculty Forum Online broadcast, Knittel discussed his studies of consumer and company reactions to energy price fluctuations and the implications of this work for effective environmental policies. Watch the video then visit the Slice of MIT blog and continue the conversation in the comments. Knittel, a William Barton Rogers Professor of Energy Economics and codirector of the Center for Energy and Environmental Policy Research, is a research associate at the National Bureau of Economic Research and an associate editor The American Economic Journal—Economic Policy, The Journal of Industrial Economics and Journal of Energy Markets.