THE BROOKINGS INSTITUTION. Co-director, Urban-Brookings Tax Policy Center, Pozen Director's Chair, and Senior Fellow in Economic Studies. Research examines how public policy—through tax systems, health programs, the social safety net, and governance structures—shapes economic behavior and well-being.. Co-director, Urban-Brookings Tax Policy Center, Pozen Director's Chair, and Senior Fellow in Economic Studies. Research examines how public policy—through tax systems, health programs, the social safety net, and governance structures—shapes economic behavior and well-being.