This paper studies how imposing norms on contribution behavior affects individuals' intrinsic motivation. We consider … legally a tax. We design a randomized field experiment with treatments informing individuals that the levy is a tax. We …, communicating the legal norm results in a significant crowd-out of intrinsic motivation. In contrast, strongly intrinsically …

public goods experiment in which subjects were induced with the motives of Care and Anger through autobiographical recall …

discounts. The evidence suggests that price discounts crowd out consumer self-inference of altruism. Alternative motivation … altruistic motives). By combining a field experiment and a structural model, these findings contribute to a growing literature on …