The many faces of GESIS
Vita
Björn Rohr completed his bachelor's degree in integrative social sciences at the Technical University of Kaiserslautern in 2018. He specialized in sociology. In his master's degree (graduating in 2021) at the same university and in the program of the same name, his focus was also on sociology and quantitative social science.Since September 2021, he has been working at GESIS as a research assistant in the Survey Operations (SDM) team. There, he conducts research on the application of non-probabilistic surveys for the social sciences and on their data quality in comparison to probabilistic surveys. Furthermore, the focus of his research is on the comparison of survey data and survey designs, regarding bias in estimation.
Publications
Journal article
Stein, Annika, Tobias Gummer, Elias Naumann, Björn Rohr, Henning Silber, Roman Auriga, Michael Bergmann, Arne Bethmann, Michael Blohm, Carina Cornesse, Pablo Christmann, Mustafa Coban, Jean-Philippe Décieux, Britta Gauly, Caroline Hahn, Susanne Helmschrott, Oshrat Hochman, Johannes Lemcke, Dörte Naber, Steffen Pötzschke, Joss Roßmann, Jan-Lucas Schanze, Tobias Schmidt, Silke L. Schneider, Heike Spangenberg, Tobias Rettig, Mark Trappmann, Michael Weinhardt, and Bernd Weiß. 2025 (Forthcoming). "Education bias in probability-based surveys in Germany: Evidence and possible solutions." International Journal of Social Research Methodology: .
Rohr, Björn, Henning Silber, and Barbara Felderer. 2024. "Comparing the Accuracy of Univariate, Bivariate, and Multivariate Estimates across Probability and Nonprobability Surveys with Population Benchmarks." Sociological Methodology online first: . doi: https://doi.org/10.1177/00811750241280963.
Working and discussion paper
Rohr, Björn, Barbara Felderer, Henning Silber, Brady T. West, Steffen Pötzschke, and Jan Priebe. 2025. Sampling for a Cross-National Survey in Six African Countries Using Social Media Advertisements: Comparison of Different Targeting Strategies, Types of Estimates, and Selectivity against Population Benchmarks. doi: https://doi.org/10.31235/osf.io/g9h47_v1.
Rohr, Björn, Barbara Felderer, Henning Silber, Jessica Daikeler, Joss Roßmann, and Jette Schröder. 2024. When are non-probability surveys fit for my purpose? GESIS- Survey Guidelines. Mannheim: GESIS - Leibniz institute for the Social Sciences. doi: https://doi.org/10.15465/gesis-sg_en_050.
Data/Software
Rohr, Björn, and Barbara Felderer. 2024. SampcompR: Comparing and Visualizing Differences Between Surveys. https://github.com/BjoernRohr/sampcompR.
Presentation at a conference
Rohr, Björn. 2025. "Backing up a Panel with Piggybacking : The Effect of Piggybacking Recruitment on Nonresponse Bias and Panel Attrition in a Mixed Mode Panel Survey." General Online Research Conference (GOR) 2025, Freie Universität Berlin, Berlin, 2025-04-02.
Felderer, Barbara, Björn Rohr, and Christian Bruch. 2025. "Do machine learning techniques improve nonresponse weighting?" GOR 25: General Online Research Conference, Freie Universität Berlin, 2025-04-01.
Rohr, Björn, Barbara Felderer, and Henning Silber. 2024. "SampcompR: An R-Package for Bias Analyses and Survey Comparisons." GOR 24: General Online Research Conference, 2024-02-21.
Rohr, Björn, Barbara Felderer, and Henning Silber. 2024. "SampcompR: : A useful R-Package for Cross-Country Survey Comparison and Bias Analyses." WAPOR 77th and WAPOR Asia Pacific 7th Joint Annual Conference, 2024-07-28.
Rohr, Björn, Barbara Felderer, and Henning Silber. 2024. "SampcompR:: A new R Package for Research Data Comparison." Leibniz MMS-Days - Mathematische Modellierung und Simulation 2024, 2024-04-12.
Rohr, Björn, Barbara Felderer, Steffen Pötzschke, Jan Priebe, Henning Silber, and Bernd Weiß. 2023. "Comparing Social Media Samples in Africa against the Demographic Health Survey." General Online Research Conference (GOR) 2023, 2023-07-21.
Rohr, Björn, Barbara Felderer, Steffen Pötzschke, Jan Priebe, Henning Silber, and Bernd Weiß. 2023. "Sampling a Cross-National Health Survey with Social Media Advertisements: Comparing Selection Bias for Different Targeting Strategies in Three African Countries." European Survey Research Association (ESRA) 2023 Conference, 2023-07-20.
Rohr, Björn, Henning Silber, and Barbara Felderer. 2022. "Comparing Bivariate and Multivariate Relationships Across four Non-Probability and Probability Surveys." DAGStat Conference 2022, Universität Hamburg, Hamburg, 2022-03-28.
Rohr, Björn, Barbara Felderer, and Henning Silber. 2022. "Comparing estimates of probability and non-probability surveys against populations benchmarks from the German Mikrozensus." General Online Research Conference (GOR) 2022, 2022-09-08.
Rohr, Björn, Barbara Felderer, and Henning Silber. 2022. "Comparing Probability and Non-Probability Surveys against Benchmarks from the German Mikrocensus." 10. Konferenz "Forschen mit dem Mikrozensus", Online, 2022-11-24.
Presentation not at a conference
Rohr, Björn, Henning Silber, and Barbara Felderer. 2023. "Comparing probability and non-probability surveys against population benchmarks from the German Microcensus." DRS Research Colloquium, GESIS - Leibniz-Institut für Sozialwissenschaften, Mannheim, 2023-05-16.
Rohr, Björn, Henning Silber, and Barbara Felderer. 2021. "Der Vergleich zwischen nicht-probabilistischen und probabilistischen Samples. : Erste Ergebnisse und R-Tools.." Non-Probability AG, GESIS., GESIS - Leibniz-Institut für Sozialwissenschaften, Mannheim.
Seminar
Singh, Ranjit K., and Björn Rohr. 2024. "Introduction to R." GESIS - Leibniz-Institut für Sozialwissenschaften, Mannheim. Frühjahrs-/Sommersemester 2024.