Affiliation: | 1.School of Finance, Nankai University, Tianjin, 300350, China ;2.Business School, Nankai University, Tianjin, 300071, China ;3.Institute for Financial and Actuarial Mathematics, Department of Mathematical Sciences, University of Liverpool, Liverpool, L69 7ZL, UK ;4.African Institute for Mathematical Sciences, Accra, Ghana ;5.University of Ghana, Accra, Ghana ; |