RT Journal T1 Socioeconomic Status and Obesity Gradient over Age: New Evidence from China A1 Bing Ma PB Front. Econ. China FD 2012-03-05 YR 2012 JF Frontiers of Economics in China JO Front. Econ. China VO 7 IS 1 SP 70 DO 10.3868/s060-001-012-0004-0 K1 body weight;BMI;overweight;obesity;socioeconomic status;China LK {https://academic.hep.com.cn/fec/EN/article/article_2866.shtml}