In this paper we report experimental results that relate to the recprocity experiment of Berg, Dickhaut, and McCabe (1995). We consider direct reciprocity, which means to respond in kind to another person, and indirect reciprocity, understoode as rewarding someone else. Another variation conerns...

A taboo is an "unthinkable" action, that is, even the thought of violating it triggers social punishment. Taboos are the social "thought police," discouraging individuals from considering certain type of actions. We consider a simple model in which taboos are part of the definition of one's...