Dilemma games: game parameters and matching protocols

This study examines the impact of changes in pecuniary payoffs and the link ages between players in the game environment on strategy choice in repeated PD games. Rates of cooperation are found to be correlated with variations in game parameters related to concepts of Fear, Greed, and Cooperators' Gai n. In addition, rates of cooperation are affected by the information that s ubjects have regarding the history of play of their counterparts, as well a s the protocol used for matching subjects across decision rounds. (C) 2001 Elsevier Science B.V. All rights reserved.