usefulness of the approach in the context of field experiments on gift exchange. Our results suggest that a BS design requires …

strength. We then present three experiments that study main predictions and implications of the model. The first is a simple …

phenomena. However, the empirical foundation of social preferences is largely based on laboratory experiments with self …-selected students as participants. This is potentially problematic as students participating in experiments may behave systematically … experiments with student samples misrepresent the importance of social preferences. Our first study shows that students who …