Fairness is a strong concern as shown by dictator and ultimatum experiments. Efficiency, measured by the sum of individual payoffs, is a potentially competing concern in games such as the prisoners' dilemma. In our experiment participants can increase efficiency by gift giving. In the one-sided...

Evolutionary game theory is often used to analyze the evolution of moral preferences. A few studies also examine the co-evolution of preferences and an institutional aspect of the environment. Allowing the adaption of just one institutional aspect such as litigation or legal insurance to...

Motivationen treiben Entscheidungen an. Doch welche Ziele werden im Kontext ökonomischer Entscheidungen verfolgt? Sowohl die 'Realität' als auch die experimentelle Wirtschaftsforschung zeichnen ein widersprüchliches Bild. 'Fairneß' beeinflußt Verhandlungsergebnisse, 'Reziprozität' hilft...