January 2025, for the first time in the postwar history of Germany's national parliament, a mainstream political party (the Christian Democratic Union) relied on the support of the Alternative for Germany (AfD) to pass a motion. This prompted intense public debate as many Germans worried that...

Does online fundraising increase charitable giving? Using the Facebook advertising tool, we implemented a natural field experiment across Germany, randomly assigning almost 8,000 postal codes to Save the Children fundraising videos or to a pure control. We studied changes in the donation revenue...

Klassischerweise üben Vertreter der Wirtschaft sich jenseits der unmittelbaren Betroffenheit weitgehend parteipolitischer Enthaltsamkeit. Da sich in der Bundesrepublik mit der Alternative für Deutschland (AfD) eine von ihrer wirtschaftspolitischen Programmatik her liberal-rechtspopulistische...

The Immigration Policies in Comparison (IMPIC) database includes data on migration policies for 33 OECD countries and the period 1980-2018. The dataset is presented in Helbling, Marc, Liv Bjerre, Friederike Römer and Malisa Zobel (2016) "Measuring Immigration Policies: The IMPIC-Database",...

We study the problem of assigning indivisible objects to agents where each is to receive one object. To ensure fairness in the absence of monetary compensation, we consider random assignments. Random Priority, also known as Random Serial Dictatorship, is characterized by symmetry, ex-post...

We study how one person may shape the way another person interprets objective information. They do this by proposing a sense-making explanation (or narrative). Using a theory-driven experiment, we investigate the mechanics of such narrative persuasion. Our results reveal several insights. First,...

During recent crises in Europe, new heterogeneous protest movements have emerged that are difficult to label and classify. Existing studies suggest that the common denominator of these protesters is primarily the lack of political trust. Therefore, these new protest movements offer favorable...

The worsening climate crisis calls for restructuring mobility systems and urban infrastructure. One goal of the socio-ecological transformation in the mobility sector is to promote walking. Measurements of pedestrian friendliness are summarised under the term walkability or walkability index,...

We use a laboratory experiment to investigate whether statements from a governmental institution expressing concerns about price increases trigger such increases by facilitating tacit collusion. Such statements on market conduct are disclosed after an exogenous and unexpected upward cost shock....

How do mechanisms that enforce cooperation emerge in a society where none are available and agents are endowed with just raw power that allows a more powerful agent to expropriate a less powerful one? We study a model where expropriation is costly and agents can choose whether to engage in...