• since 12/2020: Quality assurance and ethics committee Karlsruhe Decision & Design Lab (KD²Lab)
• 2016 - 2020: Ph.D. in Economics, Ph.D. Thesis: "Voting over Resource Allocation: Nash Equilibria and Costly Participation"
• since 04/2014 Research Assistant at the Chair of Economic Theory
• from 10/2011 to 10/2013 Master of Science: International Economics at the Universität Regensburg
• from 10/2008 to 08/2011 Bachelor of Science: International Economics at the Universität Regensburg
• from 09/2007 to 07/2008: Education state-certified foreign language correspondent at the Euro-Berufsfachschule in Aschaffenburg (Germany)
• 06/2007 Abitur at the Julius-Echter-Gymnasium in Elsenfeld (Germany)

• Experimental Voting Theory
• Game Theory
• Behavioral Economics

Publications

• Puppe, C. and J. Rollmann (2022), Participation in Voting over Budget Allocations. A Field Experiment, Advances in Collective Decision Making
• Puppe, C. and Rollmann, J. (2021), Mean versus median voting in multi-dimensional budget allocation problems. A laboratory experiment, Games and Economic Behavior, 130, 309-330
• Rollmann, J. (2020), Voting over Resource Allocation: Nash Equilibria and Costly Participation, PhD thesis, Karlsruhe Institute of Technology (KIT)

2019

• Postersession Summer School "Pluridisciplinary Analysis of Collective Decision Making", Caen (France), August 2019

2018

• 14th Meeting of the Society for Social Choice and Welfare, Seoul (South Korea), June 2018
• HeiKaMaX Workshop, Mannheim, May 2018
• Research Seminar Obergurgl, January 2018

2017

• European Meeting of the Economic Science Association, Vienna (Austria), September 2017
• Poster session KD2Lab Opening, Karlsruhe, April 2017

2016

• The 13th Meeting of the Society for Social Choice and Welfare, Lund (Sweden), June/July 2016
• EFI-KIT Microeconomics Workshop on Voting and Innovation politics, Berlin, June 2016
• HeiKaMaX Workshop, Heidelberg, April 2016

2015

• European Meeting of the Economic Science Association, Heidelberg, September 2015
• WIWI (KIT) - BETA (UdS-CNRS) WORKSHOP: "Voting Behavior and Social Context", Ottrott (France), July 2015
• KIT Doctoral Colloquium, Karlsruhe, July 2015
• CESS/Munk Summer School on Experimental Social Sciences, University of Toronto (Canada), May 2015

• Nudging: Ein probates Mittel in Zeiten von COVID-19?, 2021 (bachelor thesis)
• Moralisches Handeln am Markt: Eine experimentelle Gegenüberstellung von Vermeidung und Verursachung von Konsequenzen für Dritte, 2021 (bachelor thesis)
• Risikowahrnehmung und -verhalten bei Reisen: Eine experimentelle Untersuchung zum Buchungsverhalten während einer Pandemie, 2021 (bachelor thesis)
• Design and implementation of a decentralised and confidential communication structure for a social app for consensus finding, 2021 (master thesis)
• Wohlfahrtsaspekte von Abstimmungen unter Teilnahmekosten, 2020 (bachelor thesis)
• Theoretische und empirische Untersuchung von Reziprozität in der Verhaltensökonomik, 2019 (bachelor thesis)
• Experimentelle Erkenntnisse zur Wahlbeteiligung, 2019 (bachelor thesis)
• Wahlbeteiligung bei Abstimmungen zur Budget-Allokation unter dem Median- und Mittelwert-Verfahren, 2018 (bachelor thesis)
• Nudges in voter mobilization studies, 2018 (bachelor thesis)
• Voting over Resource Allocation: Existence and Characteristics of Equilibria, 2018 (bachelor thesis)
• Analytische und experimentelle Untersuchung von Ultimatumspielen mit modifizierten Auszahlungen, 2017 (master thesis)
• Verhaltensökonomie in der Politik: Gesellschaftspolitische Experimente durch Nudging, 2016 (bachelor thesis)
• Nudging im Bereich der Organspende, 2016 (bachelor thesis)
• Homo sociologicus culturalis: Wie Kultur soziale Präferenzen prägt, 2016 (bachelor thesis)
• Nash-Gleichgewichte von Abstimmungen unter der Durchschnitts- und Median-Regel, 2015 (bachelor thesis)
• Ökonomische Experimente - Theorie und Praxis, 2015 (bachelor thesis)