Nick Hart (PhD, Program Evaluation, George Washington University) is the president of the Data Foundation, a Washington, DC-based non-profit that works to improve government and society by encouraging the use of data to improve public policymaking. Prior to joining the Data Foundation, Dr. Hart was director of the Bipartisan Policy Center’s Evidence Project. In that capacity, he championed a strategy for implementing the bipartisan recommendations issued by the U.S. Commission on Evidence-Based Policymaking. Dr. Hart previously served as the policy and research director for the Commission, overseeing the policy and research team and leading development of the Commission’s final report for Congress and the President in 2017. With nearly a decade of experience in the federal government, Dr. Hart worked on a wide range of issues including social security, disability, anti-poverty, environmental, energy, economic development, and criminal justice policies. He served at the White House Office of Management and Budget (OMB) as a senior analyst and special assistant. He is a fellow of the National Academy of Public Administration and at the Bipartisan Policy Center. Dr. Hart co-facilitated the discussion of the “Heterogeneity: Subgroup Findings” presentation at Lessons Learned from SSA Demonstrations: A State of the Science Meeting.