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Trappmann, Mark; Krumpal, Ivar; Kirchner, Antje; Jann, Ben (2014). Item Sum: A New Technique for Asking Quantitative Sensitive Questions. Journal of Survey Statistics and Methodology, 2(1), pp. 58-77. Oxford University Press 10.1093/jssam/smt019
Trappmann, Mark; Krumpal, Ivar; Kirchner, Antje; Jann, Ben (18 May 2012). Item Sum: A New Technique for Asking Quantitative Sensitive Questions (Unpublished). In: AAPOR 67th Annual Conference. Orlando. 18.05.2012.
Trappmann, Mark; Kumpal, Ivar; Kirchner, Antje; Jann, Ben (2012). Item Sum: A New Technique for Asking Quantitative Sensitive Questions (Unpublished). In: MPSA National Conference. Chicago. 11.-14.04.2012.
Trappmann, Mark; Krumpal, Ivar; Kirchner, Antje; Jann, Ben (2012). Item Sum: A New Technique for Asking Quantitative Sensitive Questions (Unpublished). In: WAPOR 65th Annual Conference. Hong Kong. 14.-16.06.2012.
Trappmann, Mark; Krumpal, Ivar; Kirchner, Antje; Jann, Ben (28 November 2011). Social Desirability Bias in Survey Measures of Illicit Work. In: Workshop "Rational Choice Sociology: Theory and Empirical Applications". Venice International University. November 28 - December 2, 2011.
Trappmann, Mark; Krumpal, Ivar; Kirchner, Antje; Jann, Ben (18 November 2011). Social desirability bias in survey measures of illicit work. In: 2nd International Conference of the German Priority Programme on Survey Methodology (PPSM) on Advancing Survey Methods. Bremen. November 17/18, 2011.
Kirchner, Antje; Krumpal, Ivar; Trappmann, Mark; von Hermanni, Hagen (2011). In the Shadow: Zur Messung von Schwarzarbeit in Arbeitsmarktsurveys, Kolloquium in Sozialtheorie, Universität Leipzig, Deutschland, Januar 26, 2011.
Kirchner, Antje; Krumpal, Ivar; Trappmann, Mark; von Hermanni, Hagen (2011). Eliciting Illicit Work: Item Count and Randomized Response Technique put to the test, 4th Conference of the European Survey Research Association, ESRA 2011, Lausanne, Switzerland, July 18-22, 2011.
Kirchner, Antje; Krumpal, Ivar; Trappmann, Mark; von Hermanni, Hagen (2011). Eliciting Illicit Work: Item Count and Randomized Response Technique put to the test, Joint Statistical Meeting, JSM 2011, Miami Beach, Florida, USA, July 30 - August 4, 2011.
