1. Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences, Beijing
2. Department of Computer Science, University of Illinois, UrbanaChampaign
3. Eccles School of Business, University of Utah, USA
4. Department of Sociology, Cornell University, USA
5. School of Computer Science, Carnegie Mellon University, USA
6. Department of Computer Science, Rensselaer Polytechnic Institute, USA