Are incentive effects on response rates and nonresponse bias in large-scale, face-to-face surveys generalizable to Germany? : evidence from ten experiments

author list: Klaus Pforr, (GESIS - Leibniz-Institute for the Social Sciences, Mannheim, Germany), Michael Blohm, (GESIS - Leibniz-Institute for the Social Sciences, Mannheim, Germany), Annelies G. Blom, (School of Social Sciences, University of Mannheim, Mannheim, Germany,), Barbara Erdel, (Institute for Employment Research, German Federal Employment Agency, Nürnberg), Barbara Felderer, (University of Mannheim, Mannheim, Germany), Mathis Fräßdorf, (DIW Berlin, Berlin, Germany), Kristin Hajek, (Ludwig-Maximilians-Universität München, Institut für Soziologie, München, Germany), Susanne Helmschrott, (Collaborative Research Center "Political Economy of Reforms" (SFB 884), University of Mannheim, Mannheim, Germany), Corinna Kleinert, (Universität Bamberg, Bamberg, Germany), Achim Koch, (GESIS – Leibniz-Institute for the Social Sciences, B2, 14, Mannheim, Germany), Ulrich Krieger, (Collaborative Research Center "Political Economy of Reforms" (SFB 884), University of Mannheim, L 13,15-17, Mannheim, Germany), Martin Kroh, (DIW Berlin, Berlin, Germany), Silke Martin, (GESIS - Leibniz-Institute for the Social Sciences, M1, 10, Mannheim, Germany), Denise Saßenroth, (DIW Berlin, Berlin, Germany), Claudia Schmiedeberg, (Ludwig-Maximilians-Universität München, Institut für Soziologie, München, Germany), Eva-Maria Trüdinger, (Universität Stuttgart, Institut für Sozialwissenschaften, Stuttgart, Germany), Beatrice Rammstedt, (GESIS - Leibniz-Institute for the Social Sciences, B2, 1, Mannheim, Germany)