Effects of dialogue meetings on sickness absence-Evidence from a large field experiment.

Sickness absence entails large individual and societal costs. Dialogue Meetings (DMs) where the absentee, the employer, and the physician discuss arrangements for full or partial work resumption have been in place in Norway since 2007. In collaboration with the Labour and Welfare Administration, we conducted a large-scale, pre-registered, randomized field experiment to evaluate aspects of the Norwegian DMs policy. We do not find statistically significant effects of summoning to a meeting and we can reject even small threat (notification) effects of sending out letters. We also conduct an extensive search for heterogeneous treatment effects but find no evidence of these.

Sustaining cooperation through self-sorting: The good, the bad, and the conditional.

In four public-good game experiments, we study self-sorting as a means to facilitate cooperation in groups. When individuals can choose to join groups precommitted to charity, such groups sustain cooperation toward the group's local public good. By eliciting subjects' conditional contribution profiles, we find that subjects who prefer the charity groups have higher average conditional contribution levels but do not differ with respect to the slope of their profiles. The majority of subjects in both group types are conditional cooperators whose willingness to contribute is stimulated by generous group members but undermined by free-riders. Charity groups thus seem better able to sustain cooperation because they attract a greater number of more generous individuals, triggering generous responses by conditional cooperators.