As a first step towards understanding the evolution of small groups in firms, this paper develops and tests a simple decision-theoretical model of research-unit evolution in which, as managers resolve their uncertainty over time, they shut down under-performing units and remove under-performing...

This paper investigates whether encouraging children to become more physically active in their everyday life affects their primary school performance. We use data from a field quasi-experiment called the Active Living Program, which aimed to increase active modes of transportation to school and...

This paper examines the issue of whether workers learn productive skills from their co-workers, even if those skills are unethical. Specifically, we estimate whether Jose Canseco, one of the best baseball players in the last few decades, affected the performance of his teammates. In his...