Field evidence suggests that people belonging to the same group often behave similarly, i.e., behaviour exhibits social interaction effects. We conduct an experiment that avoids the identification problem present in the field. Our novel design feature is that each subject simultaneously is a...

Field evidence suggests that people belonging to the same group often behave similarly, i.e., behavior exhibits social interaction effects. We conduct a laboratory experiment that avoids the identification problem present in the field and allows us to study the behavioral logic of social...

It is frequently argued that unemployment plays a crucial role for the occurrence of right- wing extremist crimes. We empirically test this hypothesis using data from Germany. We find that right-wing criminal activities occur more frequently when unemployment is high. The big difference in...

Field evidence suggests that people belonging to the same group often behave similarly, i.e., behaviour exhibits social interaction effects. We conduct an experiment that avoids the identification problem present in the field. Our novel design feature is that each subject simultaneously is a...

This paper investigates the driving forces behind informal sanctions in cooperation games and the extent to which theories of fairness and reciprocity capture these forces. We find that cooperators' punishment is almost exclusively targeted towards the defectors but the latter also impose a...

Field evidence suggests that people belonging to the same group often behave similarly, i.e., behavior exhibits social interaction effects. We conduct a laboratory experiment that avoids the identification problem present in the field and allows us to study the behavioral logic of social...

This paper examines the determinants of informal sanctions by a large number of experiments.

It is frequently argued that unemployment plays a crucial role for the occurrence of right-wing extremist crimes. We empirically test this hypothesis using data from Germany. We find that right-wing criminal activities occur more frequently when unemployment is high. The big difference in...

It is frequently argued that unemployment plays a crucial role for the occurrence of right- wing extremist crimes. We empirically test this hypothesis using data from Germany. We find that right-wing criminal activities occur more frequently when unemployment is high. The big difference in...

Field evidence suggests that agents belonging to the same group tend to behave similarly, i.e., behavior exhibits social interaction effects. Testing for such effects raises severe identification problems. We conduct an experiment that avoids these problems. The main design feature is that each...