Following is a brief summary of its contents, which may be of general interest. Merely providing group members with information about the co-ordination success of another group is not sufficient to generate this effect. This study shows that both resistance to unfairness and educative punishment are determinants of behaviour, but that neither is sufficient to explain the observed behaviour on its own. A Four Country Comparison of Spite and Cooperation in Voluntary Contribution Mechanisms, Arthur Schram, Jordi Brandts and Tatsuyoshi Saijo. According to this study voluntary contributions to a public good cannot be explaind as the results of errors.
Individuals exhibit one of two types of behavior.
One group of subjects behaves in a way consistent with some kind of other-regarding motivation. Another group of subjects behaves in a selfish way. The interaction between these two groups is important when explaining contributions over time. Here, the consequences of incomplete contracts, e.g. contracts where behaviour is not completely regulated under the terms of the contract, are investigated.