Variables

Meanings

${\beta }_{\text{0}}$

constant term

${\beta }_{\text{1}}\text{-}{\beta }_{\text{8}}$

regression coefficient

${\epsilon }_{it}$

error term

$\ln Z{Y}_{it}$

logarithmic form of technical complexity of medical device export in China

$\ln FD{I}_{it}$

logarithmic form of foreign investment

$\ln H{R}_{it}$

logarithmic form of education expenditure

$\ln R{I}_{it}$

logarithmic form of expenditure

$\ln PLAN{D}_{it}$

logarithmic form of natural resources

$\ln I{M}_{it}$

logarithmic form of import trade

$\ln H{I}_{it}$

logarithmic form of health expenditure

$\ln AG{E}_{it}$

logarithmic form of aging change and population scale

$\ln PO{P}_{it}$

logarithmic form of population size