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Peter Winker Editor & Author

Peter Winker is professor of statistics and econometrics at the University Gießen.
Natalja Menold is a senior researcher at the Center for Survey Design & Methodology at the GESIS – Leibniz Institute for the Social Sciences in Mannheim.
Rolf Porst was a senior researcher at the Center for Survey Design & Methodology at the GESIS – Leibniz Institute for the Social Sciences in Mannheim until he retired in 2012.