This paper presents estimation results on the size and loyalty of sport teamsÕ sup- porter groups in professional German football. Based on a novel two-stage estimation procedure, we find clear evidence for heterogeneity across teams. In a first stage, a random utility model for a...

This paper provides non-experimental field evidence on positive and negative worker reciprocity. We analyze the performance reactions of professional workers to fair and unfair wage allocations in their natural environment. The objects of interest are professional soccer players in the German...

This paper presents estimation results on the size and loyalty of sport teams’ supporter groups in professional German football. Based on a novel two-stage estimation procedure, we find clear evidence for heterogeneity across teams. In a first stage, a random utility model for a representative...

Existing evidence shows that decision-makers' social ties to internal co-workers can lead to reduced firm performance. In this paper, we show that decision-makers' social ties to external transaction partners can also hurt firm performance. Specifically, we use 34 years of data from the National...