can promote cooperation through a combination of sorting and opportunistic signaling, with late period defections by … remains unclear. In each of six treatments that vary the cooperation premium and the informational basis for reputation …, that with a high cooperation premium and good information, investment in reputation grows across sets of finitely …

opportunity for profitable cooperation. Our experimental method creates two groups of subjects who are similar but have different … long-run losses. Initially similar, cooperation rates for groups with different intelligence levels diverge, declining in … groups of lower intelligence, and increasing to reach almost full cooperation levels in groups of higher intelligence …

interaction impacts cooperation within groups and surplus distribution. We developed and tested experimentally a Surplus … Allocation Game where cooperation of four agents is needed to produce surplus, but only two have the power to allocate it among … distributors and receivers. While behavior at the group level is diverse for surplus allocation and amount of cooperation …

strategies which support cooperation in one group only. These last strategies have the property that cheating on the agreement in … the cooperative group is followed by non-cooperation in this group and cooperation in the rival group. The main conclusion … is that the set of parameters for which cooperation can be sustained within the larger group as a subgame perfect outcome …

. For this purpose, we develop an infinitely repeated rent-seeking model with two groups where within-group cooperation is … then characterize the conditions under which cooperation among fellow members within each group can be achieved as a … stationary subgame perfect equilibrium. The main conclusion is that the larger group has more chances to maintain cooperation …