1 Department of Economics, Rutgers University Camden , Camden, NJ , USA ; Center for Children and Childhood Studies, Rutgers University Camden , Camden, NJ , USA.
2 Department of Epidemiology and Community Health, New York Medical College , Valhalla, NY , USA.
3 Department of Economics, Rutgers University Camden , Camden, NJ , USA.
4 Division of Federal-State Cooperative Programs, Bureau of Labor Statistics, U.S. Department of Labor , Philadelphia, PA , USA.