模型I (Y₁)

模型II (Y₁)

模型I (Y₂)

模型I (Y₃)

rgdp

−2.428^***

−0.235^***

−1.493^***

(0.000)

(0.006)

(0.000)

Rgdp²

0.108^***

0.010^***

0.067^***

(0.000)

(0.000)

(0.000)

ps

−0.263^***

(0.000)

envi

−0.003

0.159^***

−0.020^***

0.049^**

(0.903)

(0.000)

(0.000)

(0.041)

fee

0.032^***

0.022^***

0.003^**

0.017^**

(0.000)

(0.001)

(0.025)

(0.014)

mark

0.615^***

−0.138^*

0.103^***

0.431^***

(0.000)

(0.057)

(0.000)

(0.000)

gc

−0.004^**

−0.001

0.001^***

−0.005^***

(0.046)

(0.732)

(0.005)

(0.005)

gc²

0.000

0.000

0.000^***

0.000^**

(0.226)

(0.761)

(0.000)

(0.03)

tech

0.005

−0.004

0.007^*

−0.006

(0.764)

(0.801)

(0.058)

(0.701)

fdi

−0.020^*

0.018^*

0.007^**

−0.038^***

(0.073)

(0.095)

(0.017)

(0.000)

_cons

11.860^***

1.137^***

2.035^***

7.222^***

(0.000)

(0.000)

(0.000)

(0.000)

Wald chi²(8)

89.390^***

166.480^***

89.970^***

80.250^***

Prob > chi²

(0.000)

(0.000)

(0.000)

(0.000)