In decision problems with absentmindedness the decision maker may manifest time-inconsistent choices in spite of unaltered preferences. In this paper we argue that this can be the case whenever the decision makeris reasoning is not appropriately modeled. More in particular, it is shown that the...

We assess in the laboratory the impact of promises on group decision-making. The gift-exchange game provides the testing ground for our experiment. When played between groups, inter-group cooperation and reciprocity represent a condition for efficiency in overall decision making. We find that...