A conflict game simulating social traps in which a collective good can be provided by a volunteer is discussed and some solution concepts are analyzed. There is a greater incentive for “free riding†than for the production of the collective good at the cost of the volunteer. However,...

In two experiments, the existence and extent of altruistic reciprocity is exploredin the context of a simple experimental game, “the sequential dictator.†Findings show that altruistic reciprocity is frequent and robust, and the reciprocity norm does not erode if stakes are raised....