1. Florian Heiss is a postdoctoral fellow in the Department of Economics, University of Munich, Germany. Daniel McFadden () is the E. Morris Cox Professor, Department of Economics, University of California, Berkeley. Joachim Winter is a professor of economics in the Department of Economics, University of Munich. All three authors are affiliates of the RAND HRS program project on Internet surveying. McFadden is also a faculty affiliate of the University of Michigan Survey Research Center and a principal...