In competitive multi-agent systems, the act of requesting recommendations to evaluate the reputation of an agent is a cost. On the contrary, an agent computes the reliability of another agent without paying any price. This implies the necessity for the agent to decide in which measure to use the reputation with respect to the reliability when he must select the most promising interlocutors. In ...

Reputation systems help establish social control in peer-to-peer networks. To be truly effective, however, a reputation system should counter attacks that compromise the reliability of user ratings. Existing reputation approaches either average a peer’s lifetime ratings or account for rating credibility by weighing each piece of feedback by the reputation of its source.While these systems impro...

We consider a duopoly market in which two retailers with different reputation compete in prices and one of the retailers is considering selling through a new channel. Consumers are reputation sensitive and averse to the new channel. In addition, the reputation sensitivity and new channel aversion are heterogeneous across consumers. In such a setting, we find that, there must be some cost reduct...

Reputation is an important social construct in science, which enables informed quality assessments of both publications and careers of scientists in the absence of complete systemic information. However, the relation between reputation and career growth of an individual remains poorly understood, despite recent proliferation of quantitative research evaluation methods. Here, we develop an origi...

Each participant in peer-to-peer network prefers to free-ride on the contribution of other participants. Reputation based resource sharing is a way to control the free riding. Instead of classical game theory we use evolutionary game theory to analyse the reputation based resource sharing in peer to peer system. Classical game-theoretical approach requires global information of the population. ...

Trust and reputation are important factors that influence the success of both traditional transactions in physical social networks and modern e-commerce in virtual Internet environments. It is difficult to define the concept of trust and quantify it because trust has both subjective and objective characteristics at the same time. A well-reported issue with reputation management system in busine...

User reputation has become a valuable commodity for enabling trusted transactions on the Internet especially with strangers in virtual communities. However, the reputation information about the various users are normally locked-up in the silos of different web-portals where the members interact. This effectively creates multiple reputation ratings for the same user, each one painstakingly built...