TY - Front. Econ. China A1 - Qihong Liu, Jie Shuai T1 - Multi-Dimensional Product Differentiation Y1 - 2019-12-15 JF - Frontiers of Economics in China JO - Front. Econ. China SP - 497 EP - 535 VL - 14 IS - 4 UR - https://journal.hep.com.cn/fec N1 - 10.3868/s060-008-019-0021-1 ER -