[1] Capital Univ Econ & Business, Sch Finance, Beijing 100070, Peoples R China
[2] Loboratory Fintech & Risk Management, Tianjin 300222, Peoples R China
[3] Tianjin Univ Finance & Econ, Sch Finance, Tianjin 300222, Peoples R China
[4] Beijing Technol & Business Univ, Beijing 100048, Peoples R China