1. Associate Professor, Hunan Key Laboratory of Macroeconomic Big Data Mining and its Application, School of Business, Hunan Normal University, No. 36 Lushan Road, Changsha, Hunan 410081, China P.R.
2. Graduate student, Hunan Key Laboratory of Macroeconomic Big Data Mining and its Application, School of Business, Hunan Normal University, No. 36 Lushan Road, Changsha, Hunan 410081, China P.R.
3. Lecturer, Hunan Key Laboratory of Macroeconomic Big Data Mining and its Application, School of Business, Hunan Normal University, No. 36 Lushan Road, Changsha, Hunan 410081, China P.R.
4. Professor, College of Economics and Management, China Agricultural University, No. 17 Qinghuadong Road, Beijing, 100091, China P.R.