Designing aggregation mechanisms for reputation systems in online marketplaces

Designing Online Marketplaces: Trust and Reputation Mechanisms

Truthful Reputation Mechanisms for Online Systems

The internet is moving rapidly towards an interactive milieu where online communities and economies gain importance over their traditional counterparts. While this shift creates opportunities and benefits that have already improved our day-to-day life, it also brings a whole new set of problems. For example, the lack of physical interaction that characterizes most electronic transactions, leave...

Collaborative Reputation Mechanisms in Electronic Marketplaces

The members of electronic communities are often unrelated to each other, they may have never met and have no information on each other's reputation. This kind of information is vital in Electronic Commerce interactions, where the potential counterpart's reputation can be a significant factor in the negotiation strategy. This paper proposes two complementary reputation mechanisms that rely on co...

Designing Reputation Mechanisms for Efficient Trade

A seller in an online marketplace with an effective reputation mechanism should expect that dishonest behavior results in higher payments now, while honest behavior results in higher reputation—and thus higher payments—in the future. We study two widely used classes of reputation mechanisms. First, we show that weighting all past ratings equally gives sellers an incentive to falsely advertise. ...

Collaborative Reputation Mechanisms for Online Communities

The members of electronic communities are often unrelated to each other, they may have never met and have no information on each other's reputation. This kind of information is vital in Electronic Commerce interactions, where the potential counterpart's reputation can be a significant factor in the negotiation strategy. I will investigate two complementary reputation mechanisms that rely on col...