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...

In two-person generosity games the proposer's agreement payoffis exogenously given whereas that of the responder is endogenouslydetermined by the proposer's choice of the pie size. Earlier resultsfor two-person generosity games show that participants seem to caremore for eciency than for equity....

This paper outlines why program evaluation should follow well-respected scientific standards and why it should be performed by independent researchers.

The quadratic scoring rule (QSR) is often used to guarantee an incentive compatibleelicitation of subjective probabilities over events. Experimentalists haveregularly not been able to ensure that subjects fully comprehend the consequencesof their actions on payoffs given the rules of the games....

The existing literature acknowledges that a mismatch between the experimenter'sand the subjects' models of an experimental task can adversely aect the interpretation ofdata from laboratory experiments. We discuss why the two common experimental designs(between-subjects and within-subjects) used...

Ökonomische Experimente sind eine bislang selten verwendete Forschungsmethodeim Bereich der agrarpolitischen Analyse. Dieser Beitrag erörtert die Grundlagenvon Experimenten, vergleicht sie mit anderen Forschungsmethoden und zeigt ein möglichesAnwendungsgebiet für die Agrarpolitikanalyse auf...

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...