Believing Others: Pros and Cons
ICMAS '00 Proceedings of the Fourth International Conference on MultiAgent Systems (ICMAS-2000)
Self-selection, slipping, salvaging, slacking, and stoning: the impacts of negative feedback at eBay
Proceedings of the 6th ACM conference on Electronic commerce
Coping with inaccurate reputation sources: experimental analysis of a probabilistic trust model
Proceedings of the fourth international joint conference on Autonomous agents and multiagent systems
Proceedings of the 7th international joint conference on Autonomous agents and multiagent systems - Volume 2
Colored trails: a multiagent system testbed for decision-making research
Proceedings of the 7th international joint conference on Autonomous agents and multiagent systems: demo papers
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In many settings, agents need to identify competent partners to assist them in accomplishing tasks. Direct experience may not provide sufficient data to learn the competence of other agents. Reputation---a community-based assessment of agent competence---can augment direct experience, but is prone to error. This paper addresses the question of when reputation information is useful, examining a variety of multiagent settings. It provides a systematic study of the way the utility of reputation varies by group size, group competency, level of error, and whether reputation information is available. Results demonstrate that the utility received from reputation increases as group size increases. However, the experiments also show that reputation is useful in small groups, during early rounds of a game series. These results also revealed a "pigeonholing phenomenon" in which highly capable agents are miscategorized by the reputation system as having low competence based on early sequences of low performance. This effect can be countered by introducing a systematic positive bias to the system.