It has been shown that psychological predispositions to benefit others can motivate human cooperation and the evolution of such social preferences can be explained with kin or multi-level selection models. It has also been shown that cooperation can evolve as a costly signal of an unobservable...

It has been shown that psychological predispositions to benefit others can motivate human cooperation and the evolution of such social preferences can be explained with kin or multi-level selection models. It has also been shown that cooperation can evolve as a costly signal of an unobservable...

We study a class of trust dilemmas with symmetric players that evolve in real-time. In these games, as long as all the n players continue to cooperate, the payoff function increases exponentially over time. Simultaneously, however, the temptation to defect also increases at the same rate. The...

We study a class of trust dilemmas with symmetric players that evolve in real-time. In these games, as long as all the n players continue to cooperate, the payoff function increases exponentially over time. Simultaneously, however, the temptation to defect also increases at the same rate. The...

We investigate experimentally the underlying motivations and individual differences with regard to the participation in between-group conflict in nested social dilemmas. In our nested social dilemmas, the collective is divided into two groups, and individuals allocate tokens between a private, a...

We experimentally disentangle two potential sources for endogenous social interactions effects. By comparing groups where the group norm is publicly observable with those where it is not we can measure the size of any endogenous observation effect. By comparing connected with disconnected groups...