Theories of commitment, altruism, and reciprocity have been invoked to explain and describe behavior in public goods and social dilemma situations. Commitment has been used to explain behaviors like water conservation and voting. Altruism has been applied to explain contributions to charities...

Norms of reciprocity contribute to the enforcement of cooperative agreements in bilateral sequential exchange. This paper examines the norms that apply in a reciprocal-exchange economy and what effect on trust, trustworthiness and efficiency they have. In our one-shot investment game,...