Reed Walker is an Associate Professor of Business and Public Policy and Economics at UC Berkeley. His research explores the social costs of environmental externalities, such as air pollution and how regulations to limit these externalities contribute to gains and/or losses to the economy. He is the faculty co-director of the UC Berkeley Opportunity Lab’s Climate and Environment Initiative. He is also a Research Associate at the Energy Institute at Berkeley, a faculty research fellow at the National Bureau of Economic Research, and a research fellow at IZA. He received his PhD in economics from Columbia University.