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 …

contributions to a public good. The novel idea is that people's moral motivation is "weak." Their judgment about the right …

consumption and donations among individuals. We also conduct an original experiment that enables nonparametric tests of many …

This paper tests motivational crowding out in the domain of charitable giving. A novelty is that our experiment …, preference elicitation allows us to focus on the reaction of donors characterized by different degrees of intrinsic motivation … intrinsic motivation, who received a reimbursement, reduce their donations more than four times as much as equally motivated …

This paper presents results from a modified dictator experiment aimed at distinguishing and quantifying the two … endowment. We also propose a new method of detecting warm glow motivation based on the idea that in a random-lottery incentive … motivation does not …