1. LaFollette Institute of Public Affairs, School of Social Work, Institute for Research on Poverty, University of Wisconsin-Madison, 1225 Observatory Drive, Madison, WI 53706
2. Center for Demography and Ecology, University of Wisconsin-Madison, 1225 Observatory Drive, Madison, WI 53706
3. School of Social Work and Institute for Research on Poverty, University of Wisconsin-Madison, Wisconsin-Madison, USA