RT Journal T1 Chronic Diseases, Labor Supply and Medical Expenditure at Older Age: Evidence from China A1 Chuanchuan Zhang PB Front. Econ. China FD 2013-06-05 YR 2013 JF Frontiers of Economics in China JO Front. Econ. China VO 8 IS 2 SP 233 DO 10.3868/s060-002-013-0012-7 K1 chronic disease;labor supply;household income;medical expenditure LK {https://journal.hep.com.cn/fec/EN/article/article_4105.shtml}