Achieving success often requires persistent effort. We study the effectiveness of two reward mechanisms, all-or-nothing and piece-rate, to incentivize full completion of repeated tasks over time. Our theoretical analysis shows that exogenously imposing the all-or-nothing mechanism can be...

People can become less cooperative when threatened with sanctions, and previous research has pointed to both intentions and incentives as sources of this effect. This paper reports data from a novel experiment aimed at determining the relative importance of intentions and incentives in producing...