[1] Northwest Univ, Sch Econ & Management, Xian 710069, Shaanxi, Peoples R China
[2] Univ Kansas, Sch Educ, Dept Hlth Sport & Exercise Sci, Lawrence, KS 66045 USA
[3] Shaanxi Normal Univ, Ctr Expt Econ Educ, Xian 710127, Shaanxi, Peoples R China
[4] Northwest Univ, Fac Liberal Arts, Xian 710069, Shaanxi, Peoples R China
[5] Stanford Univ, Freeman Spogli Inst Int Studies, Rural Educ Act Program, Stanford, CA 94305 USA
[6] Wuhan Univ, Sch Econ & Management, Wuhan 430072, Hubei, Peoples R China
[7] Northwest Univ Polit Sci & Law, Sch Econ, Xian 710122, Shaanxi, Peoples R China
[8] Xi An Jiao Tong Univ, Sch Econ & Finance, Xian 710061, Shaanxi, Peoples R China
[9] Shandong Univ, Inst Social Med & Hlth Adm, Sch Publ Hlth, Jinan 250012, Shandong, Peoples R China
[10] Univ N Carolina, Gillings Sch Global Publ Hlth, Dept Hlth Policy & Management, Chapel Hill, NC 27599 USA