TY - Front. Econ. China A1 - Yifan Liu, Shi-Dong Liang T1 - A Global-Optimal Portfolio Theory beyond the R-σ Model Y1 - 2020-03-15 JF - Frontiers of Economics in China JO - Front. Econ. China SP - 124 EP - 139 VL - 15 IS - 1 UR - https://academic.hep.com.cn/fec N1 - 10.3868/s060-011-020-0006-4 ER -