Fabian Pfeffer is Associate Professor in the Department of Sociology and Research Associate Professor in the Institute for Social Research at the University of Michigan. He is the founding director of the Center for Inequality Dynamics (CID), leader of the Inequality Lab, and Co-Investigator of the Panel Study of Income Dynamics (PSID).

Timothy M. (Tim) Smeeding is the Arts and Sciences Distinguished Professor of Public Affairs and Economics at the University of Wisconsin-Madison and Director of the Institute for Research on Poverty (IRP) since 2008.