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 …

, 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 …

uncertainty affects work performance and willingness to compete in the field, it can be studied in a controlled lab experiment. We … willingness to enter competition with uncertainty and ambiguity, but men react slightly more than women. Overall, both effects … contribute to men winning the tournament significantly more often than women under uncertainty and ambiguity. Hence, previous …