1. Center for Studies of Information Resources, School of Information Management , Wuhan University, 299 Bayi Road, Wuhan 430072, China
2. Centre for R&D Monitoring (ECOOM) and Department of MSI, KU Leuven, Oude Markt 13 , Leuven 3000, Belgium
3. School of Public Administration, Hunan University, 2 Lushan South Road , Changsha 410006, China