There is a longstanding concern that material rewards might undermine pro-social motivations, thereby leading to a decrease in blood donations. This paper provides an empirical test of how material rewards affect blood donations in a three-month large-scale field experiment and a fifteen-month...

Both theory and recent empirical evidence on nudging suggest that observability of behavior acts as an instrument for promoting (discouraging) pro-social (anti-social) behavior. Our study questions the universality of these claims. We employ a novel four-party setup to disentangle the roles that...

Economists believe in (monetary) incentives. However, in the specialized area of prosocial behaviours, (monetary) incentives could backfire because extrinsic motivation might crowd out intrinsic motivation. Moreover, national differences in the perception of incentives should also be considered,...

Do monetary incentives encourage volunteering? Or, do they introduce concerns about appearing greedy and crowd out the motivation to volunteer? Since the importance of such image concerns is normally unobserved, the answer is theoretically unclear, and corresponding empirical evidence is mixed....

Both theory and recent empirical evidence on nudging suggest that observability of behavior acts as an instrument for promoting (discouraging) pro-social (anti-social) behavior. We connect three streams of literature (nudging, social preferences, and social norms) to investigate the universality...

Prior work has demonstrated that prosocial incentives - where individuals' effort benefits a charitable organization - can be more effective than standard incentives, particularly when the stakes are low. Yet, little is known about the effectiveness of prosocial incentives on people's decisions...

Incentives based on esteem, honor and shame are increasingly popular and easy to use due to modern surveillance techniques. However, the use of shaming is controversial: critics argue that delegating punishment to a crowd can lead to mob justice and a loss of control over the size of the...