The purpose of this paper aims to clarify the relationship between servant leadership and organizational trust, and tries to demonstrate the mediator role of leader trust and organizational communication in this relationship. The study sample included 258 employees of Guilan province Tax Administration and for sampling we used cluster method. Previous studies have also focused on the positive impact of servant leadership in organizational trust and in this article the results show that there is a significant relationship between servant leadership, organizational trust, leader trust and organizational communication.
One of the most interesting topics in social network research is opinion formation. In this paper we have introduced a new dependent multi-dimensional opinion formation method. This method models agents with several dependent opinions so that modifying the agent's opinion about one issue can affect its opinion about another issue. Agents share their opinion with agents which have trusted them. A directed graph is used for modeling this trust network. It can be modified based on the opinion sharing between agents. By applying this algorithm in the marketing area, Predicted opinions could be used for creating management reports to facilitate strategy definition and decision making. The results of applying this method on the "Epinion" dataset show that agent's opinions converge to a stable state and a set of clusters have been formed in the community. Prediction of agent's opinion can be used for identifying appropriate products and customers and defining right marketing strategy.
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