To explore information producer distribution under the UGC(user-generated content)mode,in this study,the network Q&A community was taken as the research object.First,the comment,post,user,and timestamp data items of the music portion of the MetaFilter Q&A community was obtained as experimental data.Next,we verified the applicability of Lotka’s law to the distribution of comment frequency and number of users in the network Q&A community from the aspects of information productivity and social correlation strength,and explored the new characteris...