On the nature of reciprocal motives

Datafrom 692 subjects in 11 experimental treatments provide a systematic exploration of the existence and nature of reciprocal behavior in two-person games. The experimental design discriminates between motivations of reciprocity and (nonreciprocal) other-regarding preferences. The existence of positive reciprocity is found to be dependent on the level of social distance but not the level of monetary payoff. The larger context in which a decision is made is found to have a significant effect on negative reciprocity. These findings on payoff levels, social distance, decision context, and reciprocity have implications for both theoretical modeling and experimental design.