This project studies collaboration in highly skilled, nationally diverse teams. An unexpected international political conflict makes national diversity more salient among existing and potential team members. I exploit this natural experiment to quantify the role of social, identity-driven, costs...

What can be done to reduce the likelihood of future wars? While states’ decisions that bear on war are ultimately made by their political leaders, strengthening ordinary citizens’ control of those leaders is vital to reduce the risk of future wars. This thesis can be broken down into two...

As the most inhospitable continent on Earth, Antarctica has more than 90% of its territory covered with ice and contains around 70% of all potable water in the world. Its proximity to South America is especially relevant to Brazil, which includes it in the country’s strategic surrounding area....

Weitzman (2014) proposed that focusing international climate negotiations on a uniform carbon price is more effective than Paris style negotiations in achieving ambitious climate action. We put this hypothesis to an experimental test by simulating international negotiations on climate change in...

In seiner Thünen-Vorlesung vor dem Verein für Socialpolitik im Herbst 2020 hat Klaus Schmidt das Design von Klimaschutzverhandlungen untersucht. Er geht dabei von einem Vorschlag Martin Weitzmans aus, künftige Verhandlungen auf einen einheitlichen CO2-Mindestpreis zu fokussieren. Wäre ein...

We study the effects of financial sanctions on cross-border credit supply. Using a differences-in-differences approach to analyze eleven sanctions episodes between 2002 and 2015, we find that banks located in Germany reduce their positions in countries with sanctioned entities by 38%. The...

Sanctions restrict cross-border interactions and, therefore, not only put political and economic pressure on the target country, but they also adversely affect the sender country. This paper examines the effect of financial sanctions on the country imposing them. In particular, we analyze the...