correlate with expectations about cooperation by others among students and other demographic subgroups. However, we lack … knowledge about whether the effect of expected cooperation is causal and a general feature of populations. We fielded … a novel between-subjects experiment. The experiment varied expectations about cooperation by others. We find that higher …

Internet experiments are a new and convenient way for reaching a large subject pool. Yet, providing incentives to … games). We test whether a high score provides adequate and non-distortionary incentives by comparing it to the usual … performance based incentives. We find significant differences and conclude that high scores are not always appropriate as an …