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Two points: It seems a question of scope is in order here; what exactly is the purpose of a recommendation system? Is it a system to forward to users that which they want to see, or is it a system that suggests various opinion of high quality to users?
A frequent theme at NewAssignment.Net has been the proliferation of socially driven news sites into offbeat territories.
Intro: I was part of a group of people asked by Beth Noveck to advise the Community Patent review project about the design of a reputation and ranking system, to allow the widest possible input while keeping system gaming to a minimum.
The core issue of collaborative editing, that of accuracy and trust, has reached a point in debate where research is needed to advance the practice of content use and development.
Reputation management is the practice of understanding or influencing an individual's or business's reputation .
These ideas fed into our work on indirect reciprocity, a concept that was first introduced by Robert Trivers in a famous paper in the 1970s. I recall that he mentioned this idea obliquely when he wrote about something he called "general altruism".