Data from: Empirical studies on the network of social groups: the case of Tencent QQ

Background: Participation in social groups are important but the
collective behaviors of human as a group are difficult to analyze due to
the difficulties to quantify ordinary social relation, group membership,
and to collect a comprehensive dataset. Such difficulties can be
circumvented by analyzing online social networks. Methodology/Principal
Findings: In this paper, we analyze a comprehensive dataset released from
Tencent QQ, an instant messenger with the highest market share in China.
Specifically, we analyze three derivative networks involving groups and
their members—the hypergraph of groups, the network of groups and the user
network—to reveal social interactions at microscopic and mesoscopic level.
Conclusions/Significance: Our results uncover interesting behaviors on the
growth of user groups, the interactions between groups, and their
relationship with member age and gender. These findings lead to insights
which are difficult to obtain in social networks based on personal
contacts.