Fitting model

AIC

SBC

coefficient of determination

$\ln \left(\text{gdpsa}\right)=2.635+1.202\ast \ln \left(\text{szsa}\right)$

1.59

1.65

0.48

$\ln \left(\text{gdpsa}\right)=1.5519\ast \ln \left(\text{szsa}\right)$

1.64

1.67

0.44