RT Journal T1 Multi-Dimensional Product Differentiation A1 Qihong Liu, Jie Shuai PB Front. Econ. China FD 2019-12-15 YR 2019 JF Frontiers of Economics in China JO Front. Econ. China VO 14 IS 4 SP 497 DO 10.3868/s060-008-019-0021-1 K1 multi-dimensional model;product differentiation;unit transport costs;location choice;consumer distribution LK {https://academic.hep.com.cn/fec/EN/article/article_26621.shtml}