A cyclical network of indirect reciprocity is derived organizing 3- or6-person groups into rings of social interaction where the first individualcan help the second, the second the third, and so on till the last, who inreturn can help the first. Mutual cooperation is triggered by assuming...

We adopt an evolutionary approach to investigate whether and when condi-tional cooperation can explain the voluntary contribution phenomenon oftenobserved in public goods experiments and in real life. Formally, conditionalcooperation is captured by a regret parameter describing how much an...

In the experiment two bureaucrats independently can grant a permitwith the profit of the private party depending on when the permit is given.Whereas one bureaucrat can only veto the project, the second one hasadditional discretion in granting the permit earlier or later. We speakof greasing when...

Similar to Levati and Neugebauer (2001), a clock is used by which participantscan vary their individual contributions for voluntarily providing apublic good. As time goes by, participants either in(de)crease their contributiongradually or keep it constant. Groups of two poorly and two...

We conducted a laboratory study with a public goods game in which contributions are notsubmitted all at once but incrementally as coordinated in real time by a clock. Individualspress a button as soon as the clock equals their willingness to contribute. This publicgoods institution exploits the...

In this paper we study the robustness of the deadline effect in bargaininggames using constant and slowly decreasing pies, different time horizons,and both constant and alternating role modes. With decreasing pies efficiency requires early agreements while constant pies allow for efficient late...

We examine the effects of leading by example in voluntary contributionexperiments. Leadership is implemented by letting one group membercontribute to the public good before followers do. Such leadershipincreases contributions in comparison to the standard voluntary contributionmechanism,...

In a stochastic duopoly market, sellers must form state-specific aspirationsexpressing how much they want to earn given their expectationsabout the other's behavior. We define individually and mutually satisficingsales behavior for given individual beliefs and aspiration profiles. In afirst...

We use a two-person linear voluntary contribution mechanism with stochastic marginal benefits from the public good to examine the effect of imperfect information on contributions levels. To assess prior risk attitudes, individual valuations of several risky prospects are elicited via a...

Standard economic explanations of good conduct in trade rely almostexclusively on future-directed extrinsic motivations induced by materialincentives. But intrinsic motives to behave trustworthy and to punishuntrustworthiness do support trade. In our model, intrinsically motivatedplayers are...