Many platforms use monetary incentives to encourage user-generated content (UGC) contributions. However, empirical studies report contradictory findings: monetary incentives may either increase or decrease contribution. To understand the underlying mechanisms, we build a theoretical model where...

We consider here a large-scale social network with a continuous response observed for each node at equally spaced time points. The responses from different nodes constitute an ultra-high dimensional vector, whose time series dynamic is to be investigated. In addition, the network structure is...

College students' social network is critical because it could influence students' academic performance, attrition, and even suicide attempt. Unfortunately, the college students' social network is not easy to be collected. The existing methods (e.g., survey, online social network web sites, and...