Explanatory variables

Sulfur Dioxide

sulfur dioxide per unit of GDP

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

lnent

−0.210***

(−4.30)

−0.186***

(−2.95)

−0.464***

(−5.20)

−0.048

(−0.51)

−0.218***

(−4.94)

−0.208***

(−3.35)

−0.455***

(−5.01)

−0.075

(−0.81)

(lngdp)²

−0.195***

(−4.72)

−0.428***

(−4.37)

−0.659***

(−6.31)

−0.130

(−1.94)

−0.243***

(−5.93)

−0.488***

(−5.08)

−0.669***

(−6.30)

−0.162**

(−2.49)

lngdp

3.855***

(4.71)

8.442***

(4.23)

13.437***

(6.28)

2.751**

(2.09)

3.794***

(4.69)

8.667***

(4.42)

12.605***

(5.79)

2.38*

(1.87)

lnrd

−0.087

(−1.22)

0.250*

(1.74)

−0.198**

(−2.31)

−0.303**

(−2.33)

−0.096

(−1.36)

0.235*

(1.67)

−0.195***

(−2.24)

−0.313*

(−2.48)

lnindustry

1.282***

(6.03)

2.464***

(5.09)

0.121

(0.51)

1.186***

(2.94)

1.308***

(6.23)

2.533***

(5.32)

0.144**

(0.59)

1.227***

(3.13)

Prob > F:

0.000

0.000

0.000

0.000

0.000

0.000

0.000

0.000

F-test:

49.94

39.65

33.23

58.02

31.17

19.29

23.81

32.92

R-squared:

0.5151

0.6753

0.6226

0.4176

0.8709

0.8897

0.9178

0.8809