62% if the offer was 20% of the 1000 dollars, and 100% if the offer was 80% of the money (Chen, 2009). If the colleagues were distant then the rates were 20% for 20% of the money and 77% for 80% of the money (Chen, 2009). See also Notes References Axelrod, Robert. The Evolution of Cooperation. Revised edition. New York: Basic Books, 2006. Becker, Lawrence C. (1986) Reciprocity. London and New York: Routledge. (Paperback,1990) Chicago: University of Chicago Press. Blau, Peter M. Exchange and Power in Social Life. New York: John Wiley, 1964. Reprinted, with a new introduction, New Brunswick: Transaction Books, 1986. Carlsmith, K.M., Darley, J.M., & Robinson, P.H. (2002). Why do we punish? Deterrence and the just deserts as motives for punishment. Journal of Personality and Social Psychology, 83, 284-299. Chen, Ya-Ru, Chen, Xiao-Ping, and Portnoy, Rebecca (2009). To whom do positive norm of reciprocity apply? Effects of inequitable offer, relationship and relational-self orientation. Journal of Experimental Social Psychology Cialdini, R. B. (1984) Influence. New York, NY: Morrow. . Eisenberger, Robert, Lynch, Patrick, Aselage, Justin, and Rohdieck, Stephanie. (2004). Who takes the most revenge? Individual differences in negative reciprocity norm endorsement. Personality and Social Psychology Bulletin, 30, 787-788. Gill, Christopher. Postlethwaite, Norman. Seaford, Richard (Eds.): Reciprocity in Ancient Greece. Oxford and New York: Oxford University Press 1998. . Pratkanis, A. & Aronson, E. (2001). The Age of Propaganda: The Everyday Use and Abuse of Persuasion. New York, NY: Owl Books. . External links Norm of reciprocity Google Scholar: Norm of reciprocity Advertising Interpersonal relationships Ethical principles Concepts in ethics Moral psychology