Donors may often not be sure whether a recipient really deserves their help. Does this uncertainty deter generosity? In … an experiment we find that, to the contrary, under most specifications of uncertainty, dictators give more, compared with … the donation the same dictator makes to a recipient they know to have the expected value of the endowment with certainty …

Donors may often not be sure whether a recipient really deserves their help. Does this uncertainty deter generosity? In … an experiment we find that, to the contrary, under most specifications of uncertainty, dictators give more, compared with … the donation the same dictator makes to a recipient they know to have the expected value of the endowment with certainty …

, with either a negative externality on a third participant, uncertainty about gains from cooperation, or both. Uncertainty … foster cooperation. If we combine both qualifications and do not control for beliefs, we only find an uncertainty effect. If … expected. -- Oligopoly ; Collusion ; experiment ; Uncertainty ; negative externalities ; prisoner's dilemma …

The decision how to share resources with others often needs to be taken under uncertainty on its allocational …