reg tax

F(3, 26) = 7243.65 R-squared = 0.9988

gdp tfa imp

Prob > F = 0.0000 Adj R-squared = 0.9987

tax

Coef.

Std. Err.

t

P > t

95% CI下限

95% CI上限

gdp

0.0863864

0.0082783

10.44

0.000

0 .0693702

0.1034027

tfa

0.0803232

0.0087877

9.14

0.000

0.0622599

0.0983865

imp

0.0908234

0.0121514

7.47

0.000

0.0658459

0.1158009

_cons

−2154.111

625.5787

−3.44

0.002

−3440.007

−868.216