We consider a strategic online social network that controls information flows between agents in a social learning setting. Agents on the network select among products of competing firms of unknown quality. The network sells advertising to firms. We consider display advertising, which is standard firm-to-consumer advertising, and social advertising, in which agents who purchased that firm’s prod...

in this research i have pointed out the various aspects of the relationships between sport and politics and at the end i have suggested some ideas for improving the sports in iran. on the basis of this research, the relationships between sport and politics is a bilateral relation, because from one hand the politics impacts on sport by making and implementing sports` strategy and on the other ha...