MORE: the merged opinions reputation model

Reputation is generally defined as the opinion of a group on an aspect of a thing. This paper presents a reputation model that follows a probabilistic modelling of opinions, introduces a notion of information decay, and assesses the reliability of opinions based on the reputation of their sources. The model considers both explicit and implicit opinions, which are based on behavioural information; and it may be used for different objectives, from ranking performance to predicting behaviour.