Jeffrey Liebman is the Malcolm Wiener Professor of Public Policy at the Harvard Kennedy School where he teaches courses in social policy, public sector economics, and American economic policy. In his research, he studies tax and budget policy, social insurance, poverty, and income inequality. During the first two years of the Obama Administration, Liebman served at OMB, first as Executive Associate Director and Chief Economist and then as Acting Deputy Director. From 1998 to 1999, Liebman served as Special Assistant to the President for economic policy and coordinated the Clinton Administration’s Social Security reform technical working group. For the past two years, he has been providing pro bono assistance to state and local governments interested in implementing pay for success contracts using social impact bonds.