School of Business Administration Shenyang Pharmaceutical University Shenyang 110016 China;
School of Business Administration Shenyang Pharmaceutical University Shenyang 110016 China;
School of Business Administration Shenyang Pharmaceutical University Shenyang 110016 China;
School of Business Administration Shenyang Pharmaceutical University Shenyang 110016 China;
COVID-19; major public health events; health insurance fund; linear regression;