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Southwestern Univ Finance & Econ, Sch Publ Finance & Taxat, 555 Liutai Ave, Chengdu 611130, Sichuan, Peoples R China Southwestern Univ Finance & Econ, Sch Publ Finance & Taxat, 555 Liutai Ave, Chengdu 611130, Sichuan, Peoples R China