Seminar Series

Wednesday Faculty Research Seminar

Mathilde Dräger, Omar Martin Fieles-Ahmad

Time and Room
Time: Wednesdays, 1 pm s.t. - 2 pm
(exceptions will be noted below)
Location: Campus, building 22, room A-225 (Fakultätszentrum)

Further information
Mathilde Dräger (
Tel.:+49 (0)391/ 67 58796
Omar Martin Fieles-Ahmad (
Tel.: +49 (0)391 / 67-58954

Date Speaker/Author Title
We. 17/04/24
1:00 pm

Willem Schuchardt Behavioral Consequences of Societal Conflict Directed Civil Disobedience: A Lab-in-the-Field Experiment

Since the formation of Extinction Rebellion in 2018 protest groups applying similar forms of civil disobedience (CD) were founded across 12 western countries forming the A-22 network. We define CD as any non-violent act breaching the law who´s intentionality originates from maximizing reach within society while harm to particular individuals or groups is instrumental within certain constraints. Thus far, the Netherlands are the only government responding to protesters demands and committed to phase out inefficient fossil subsidies by 2025. But even when considering softer determinants of success as government response such as citizens decreasing reactance against climate policies (see Kountouri et al. 2023 & Ozden et al.,2022). The current impact of present climate crisis directed CD appears rather minor considering that 92% of authoritarian states (n=50) in which CD played a salient role between 1971 and 2004 underwent a at least partially successful democratic transition as illustrated by Karatnycky (2004). This lab-in-the-field experiment examines behavioural impacts of CD on recipients from civil society in the context of climate crisis mitigation. It thereby contributes to an economic assessment of changes in individual decision making moderated by CD. Participants play in groups of 6 in a sequential public good game in which they can contribute to a real public good CO2-emission reduction by either spending it on purchasing CO2 emission rights or donating to the german protest group Letzte Generation. The central treatment condition of the study is the participation of a protester of the Letzte Generation. Group members are being informed if they are paired with an activist. We hypothesize that contribution decisions change in the presence of a protester whereas the direction of the effect may be determined by the degree to which participants belief in counteracting narratives such as a lack of performative legitimacy, technological optimism and cynicism.

We. 24/04/24
1:00 pm

Robert Faßhauer Nachhaltigkeit in KMU: eine Fallstudie entlang der lebensmittelproduzierenden Wertschöpfungskette

Mit der Verabschiedung des European Green Deal 2020 durch die Europäische Union wird der Nachhaltigkeit im europäischen Wirtschaftraum ein gesetzlicher Rahmen gegeben. Zielstellung ist die Umgestaltung der EU-Wirtschaft für eine nachhaltige Zukunft. Dies betrifft nicht nur Großunternehmen. Auch kleine und mittlere Unternehmen (KMU) müssen sich ihrer Verantwortung bewusst werden. Sie haben einen erheblichen Anteil an der Bruttowertschöpfung (OECD, 2021). KMU bieten rund 70 Prozent der Beschäftigungsverhältnisse (OECD, 2021). Schätzungsweise 60 Prozent der CO2 Emissionen werden durch KMU verursacht (Hillary, 2004). Im Gegensatz zu Großunternehmen gibt es in der Literatur für KMU bis dato nur wenig Ansätze, für eine nachhaltige Unternehmensgestaltung. Ansätze für Großunternehmen sind nicht auf KMU übertragbar. Um hier einen Beitrag leisten zu können, muss verstanden werden, wie KMU mit dem Themenfeld der Nachhaltigkeit umgehen. Gründe und Motive, sich nachhaltig auszurichten, sind für KMU hinlänglich bekannt. In dieser Arbeit wird die Frage gestellt, wie sich die Art der Motivation (intrinsisch vs. extrinsisch) in KMU auf die Umsetzung der Unternehmensnachhaltigkeit auswirkt. Untersucht wird die Frage anhand einer Fallstudie in KMU entlang der lebensmittelproduzierenden Wertschöpfungskette.

We. 15/05/24
1:00 pm

Leonie Koch (LMU Munich)
Inviting person:
Prof. Andreas Knabe
Disentangling Gender Norms and Tax Incentives - Analyzing the Introduction of Joint Income Taxation for Same-Sex Couples (joint work with Elena Herold and Carina Neisser)

One potential factor contributing to the gender earnings gap is joint taxation of spouses, as it creates disincentives for the secondary earner, typically women, to work. Yet, quantifying its impact on earnings has been challenging due to the lack of exogenous variation and the interaction with traditional gender norms. We overcome these challenges by exploiting the introduction of joint taxation for existing same-sex civil partnerships in Germany in 2013. We use novel, uniquely linked, administrative income tax return data on the universe of all same-sex couples who file jointly and employ a difference-in-differences approach with different-sex couples as the control group. We find that same-sex secondary earners significantly decrease their earnings after filing taxes jointly and that the partner pay gap substantially widens.

We. 22/05/24
1:00 pm

Dmitri Bershadskyy ChatGPT’s financial discrimination between rich and poor – misaligned with human behavior and expectations (joint work with Florian E. Sachs and Joachim Weimann)

ChatGPT disrupted the application of machine-learning methods and drastically reduced the usage barrier. Chatbots are now widely used in a lot of different situations. They provide advice, assist in writing source code, or assess and summarize information from various sources. However, their scope is not only limited to aiding humans; they can also be used to take on tasks like negotiating or bargaining. To understand the implications of Chatbot usage on bargaining situations, we conduct a laboratory experiment with the ultimatum game. In the ultimatum game, two human players interact: The receiver decides on accepting or rejecting a monetary offer from the proposer. To shed light on the new bargaining situation, we let ChatGPT provide an offer to a human player. In the novel design, we vary the wealth of the receivers. Our results indicate that humans have the same beliefs about other humans and chatbots. However, our results contradict these beliefs in an important point: Humans favor poor receivers as correctly anticipated by the humans, but ChatGPT favors rich receivers which the humans did not expect to happen. These results imply that ChatGPT’s answers are not aligned with those of humans and that humans do not anticipate this difference.

We. 29/05/24
1:00 pm

Carina Keldenich The ElterngeldPlus Reform and Labour Market Outcomes of Mothers and Fathers

The switch from the means-tested “Erziehungsgeld” to the wage-replacing “Elterngeld” constituted a fundamental shift in family policy in Germany, at least as it pertains to parental benefits. Since its introduction in 2007 the “Elterngeld” has been reformed several times. Especially the reform introducing the “ElterngeldPlus” and “Partnerschaftsbonus” for births after the 1st of July 2015 changed the incentives for part-time employment during parental benefit receipt substantially. The explicit goals of this reform were to facilitate an earlier return to the labour market for women, increase the time fathers have with their children and promote a more equal distribution of market and domestic labour within couples. Empirical evidence on the impact of this reform is scarce, besides its potential to affect labour market outcomes of both mothers and fathers. I use a difference-in-differences estimation on data from the German Socio-Economic Panel to investigate the link between the introduction of the “ElterngeldPlus” with “Partnerschaftsbonus” and labour market outcomes from one year before to three years after the birth of the first child. Preliminary results suggest that labour market outcomes of both parents are different following the implementation of the reform, however the timing of these differences is later than predicted by initial theoretical considerations.

We. 12/06/24
1:00 pm

Mathilde Dräger Voluntary Participation and Cooperation in the Long Run

This study examines the question whether the deliberate decision to join a social dilemma situation leads to an increase in cooperation. Subjects receive an outside option prior to playing a repeated public goods game. Rejecting an outside option alters subjects’ beliefs regarding contributions of interaction partners. A non-credible outside option increases cooperation in the first round but might not be able to prevent the typical decaying pattern throughout the game. A credible outside option in contrast might foster sustainable cooperation throughout the game via the exclusion of free riders. In order to verify the assumption cooperative types are elicited in a first step according to Fischbacher et al. (2001).

We. 19/06/24
1:00 pm
Eduard Buzila Can the Use of Large Language Models in Higher Education Empower Students to Increase their Learning Success? – A Critical Realism Approach
We. 03/07/24
1:00 pm
Juliane Hennecke
We. 10/07/24
1:00 pm
Selina Schulze Spüntrup (Ifo Dresden)
Inviting person:
Omar Martin Fieles-Ahmad
Does implementing opt-out solve the organ shortage problem? Evidence from a synthetic control approach

In light of the persistent shortage of organ donations needed to save precious human lives, several countries have modified their organ donation laws by introducing an opt-out system, making every deceased a potential organ donor unless the person has objected. This study examines the impact of adopting opt-out on organ donation rates. Using a panel dataset covering a 21-year period, I apply a synthetic control approach to focus on countries that changed their prevailing organ donation legislation from opt-in to opt-out. I compare them to a synthetic counterfactual from countries that have kept their legislation the same since 1999. Synthetic control estimates show that Argentina and Wales achieved substantially higher organ donation rates with the shift from an opt-in to an opt-out system than without the reform taking place. My findings suggest that as one strategy among others, implementing opt-out cannot solve the organ shortage problem entirely but effectively contributes to reducing it considerably.

⭐Best Paper Award Winners

Winter 2023/2024

Jun.-Prof. Ph. D. Huyen Nguyen, M. Sc. Kim Siegling, M. Sc. Christopher Woddow

Idee und Umsetzung: Prof. Dr. Abdolkarim Sadrieh und Dipl.-Kfm. Harald Wypior | © 2024

Letzte Änderung: 07.02.2024 - Ansprechpartner: Webmaster