reg tax L.gdp

F(4, 20) = 2484.07 R-squared = 0.9980

L.tfa L5tfa L2imp

Prob > F = 0.0000 Adj R-squared = 0.9976

tax

Coef.

Std. Err.

t

P > t

95% CI下限

95% CI上限

L.gdp

0.2926721

0.0318019

9.20

0.000

0.2263344

0.3590098

L.tfa

0.0584489

0.0212518

2.75

0.012

0.0141184

0.1027793

L5tfa

−0.2121206

0.0322115

−6.59

0.000

−0.2793126

−0.1449285

L2imp

−0.1047688

0.0434203

−2.41

0.026

−0.195342

−0.0141955

_cons

−8032.721

1540.703

−5.21

0.000

−11246.57

−4818.872