(1)

(2)

(3)

(4)

(5)

(6)

Variables

SO2

Soot

SO2

Soot

SO2

Soot

FDI

0.612***

0.221*

−0.533***

−0.271*

0.119***

0.0539*

(5.12)

(2.13)

(−4.06)

(−2.40)

(4.87)

(2.56)

H × FDI

−0.0675***

−0.0243*

(−4.83)

(−2.00)

CH × FDI

0.652***

0.325*

(4.40)

(2.55)

DH × FDI

−0.652***

−0.325*

(−4.40)

(−2.55)

industry

0.0286***

0.00349

0.0239***

0.00130

0.0239***

0.00130

(4.71)

(0.66)

(3.89)

(0.25)

(3.89)

(0.25)

capital

0.000965***

0.000557*

0.00107***

0.000654**

0.00107***

0.000654**

(3.88)

(2.58)

(4.10)

(2.93)

(4.10)

(2.93)

density

−0.00000906***

−0.00000155

−0.00000749***

−0.000000902

−0.00000749***

−0.000000902

(−5.88)

(−1.16)

(−4.86)

(−0.68)

(−4.86)

(−0.68)

unemployment

0.0108

0.0226

0.00457

0.0181

0.00457

0.0181

(0.22)

(0.52)

(0.09)

(0.42)

(0.09)

(0.42)

energy

0.000999***

0.000602*

0.000897**

0.000586*

0.000897**

0.000586*

(3.54)

(2.46)

(3.19)

(2.43)

(3.19)

(2.43)

N

401

401

401

401

401

401

r2

0.471

0.304

0.465

0.309

0.465

0.309

r2_a

0.398

0.209

0.392

0.214

0.392

0.214

F

15.65

7.677

15.30

7.855

15.30

7.855