1. Key Laboratory of High Confidence Software Technologies (MOE), School of Electronics Engineering and Computer Science, Peking University, No. 5, Yiheyuan Road, Haidian District, Beijing, P. R. China
2. Research Center for Computational Social Science, Peking University, No. 5, Yiheyuan Road, Haidian District, Beijing, P. R. China
3. PKU-Haier “Smart Home” Qingdao Joint Innovation Lab, Institute of Computational Social Science Peking University (Qingdao), No. 879, Lijiangxi Road, West Coast New Area, Qingdao, Shandong, P. R. China
4. School of Management, Swansea University, Singleton Park, Swansea SA2 8PP, Wales, UK
5. School of Economics and Management, Beihang University, No. 37, Xueyuan Road, Haidian District, Beijing, P. R. China