Influence of Social Identity on Information Release in Microblog

Through analyzing the data about the release, comment and forwarding of 120,000 microblog messages, this paper finds out that the intervals between information release and comment observe the power law. It points out the significant influence of the user´s activity on the intervals of information release, and thus demonstrates the positive correlation between the activity and the power exponent. The paper also points out that user´s activity is influenced by social identity in a positive way. The simulation results based on the social identity mechanism fits well with the actual data, which indicates this mechanism is a reasonable way to explain people´s behavior in microblog.