Stefan Bender is a senior researcher at the Institute for Employment Research. Julia Laneis senior vice president of Economics, Labor, and Population Studies at the National Opinion Research Center at the University of Chicago and a senior research fellow at the U.S. Bureau of the Census. Kathryn L. Shaw is the Ernest C. Arbuckle Professor of Economics in the Graduate School of Business, Stanford University, and a research associate of the National Bureau of Economic Research. Fredrik Andersson is a senior research associate of the Cornell Institute for Social and Economic Research and a research fellow with the Longitudinal Employer-Households Dynamics Program (LEHD), U.S. Bureau of the Census. Till von Wachter is assistant professor of economics at Columbia University and a faculty research fellow of the NBER.