-induced selection") and self-selection of participants into the experiment. We find that both types of selection lead to a sample of … experts: Participants perform significantly better than the general population, in the sense of fewer violations of revealed …

We use a large-scale personalized field experiment on Wikipedia to examine the effect of motivation on domain experts …' contributions to digital public goods. In our baseline condition, 45% of the experts express willingness to contribute. Furthermore …, experts are 13% more interested in contributing when we mention the private benefit of contribution, such as the likely …