This paper uses data from the sales division of a financial services firm to investigate how a leader’s centrality in external and internal social networks is related to the objective performance of the leader’s group, and to the leader’s personal reputation for leadership among subordinates, peers, and supervisors. External social network ties were based on the friendship ties among all 88 of ...

Reputation systems, which allow peers to collaborate on estimating the trustworthiness of other peers, are considered as one of the promising directions against malicious behaviors in large scale Peer-to-Peer networks. However, a weakly designed reputation system is vulnerable to attacks such as unfair rating and collusion. This paper presents GroupRep a novel group-based reputation system for ...

In many environments, interdependent agents must work cooperatively to be successful. Cooperative ventures require the participation of multiple partners, and successful ventures require that all partners in the venture fulfill their obligations. In such environments, an agent must identify potential partners with the ability and willingness to help it reach its goals while avoiding potential p...

Previous literature on statistical discrimination explained stereotypes based on the existence of multiple equilibria, in which principals have different self-confirming beliefs about different social groups (Arrow, 1973; Coate and Loury, 1993). However, the literature has not provided an account of where the principals’ prior beliefs come from. Moreover, the static models dominating the litera...

social marketing is defined as applying marketing tools to achievedesired social targets. in other words, social marketing is the usage ofcommercial methods to increase a target group's ability to admit a belief oran action. in this article, the effect of sport clubs reputation and name on animprovement and a change in their fans' behavior was studied. using semmethod, the results dem...

In reputation systems, how to obtain node’s reputation is a crucial issue. To solve this problem, a two-layer reputation search mechanism based on ant colony and grouping is proposed. The first layer is the monitoring platform. According to physical topology, it divides nodes into groups. Each group uses network segment as its identification, and it has a super node and a candidate node. The se...