(1)

(2)

(3)

(4)

wpollution

wpollution

wpollution

wpollution

lnSewageRate

−0.0362

−0.0243

−0.0221

−0.0227

(−1.17)

(−0.78)

(−0.73)

(−0.73)

lnlaw

0.00439

0.00169

−0.00196

−0.00198

(0.60)

(0.23)

(−0.28)

(−0.28)

lncase

−0.00645

−0.00626

−0.00533

−0.00536

(−1.17)

(−1.15)

(−1.01)

(−1.01)

lnwproject

0.00307

0.000562

−0.00104

−0.00106

(0.62)

(0.11)

(−0.21)

(−0.22)

lnGRP

0.0772^***

0.0733^***

0.103^***

0.103^***

(3.29)

(3.14)

(4.37)

(4.36)

lninvest

−0.00949

−0.0138

−0.0169

−0.0168

(−0.39)

(−0.57)

(−0.72)

(−0.72)

lnexpend

0.0136

0.0175^*

0.0162^*

0.0163^*

(1.37)

(1.75)

(1.67)

(1.67)

proportion

−0.0229

−0.0208

−0.0182

−0.0182

(−1.40)

(−1.28)

(−1.15)

(−1.15)

lneducation

−0.139^***

−0.141^***

−0.154^***

−0.154^***

(−5.99)

(−6.14)

(−6.86)

(−6.85)

lnUrbanRate

0.146^***

0.150^***

0.129^***

0.130^***

(4.63)

(4.80)

(4.21)

(4.18)

lnpublic1

0.00895^**

0.0118^***

0.0118^***

(2.51)

(3.36)

(3.35)

lnpublic2

−0.0288^***

−0.0295^***

(−4.55)

(−2.86)

lnpublic3

0.000802

(0.09)

_cons

0.312

0.260

0.314

0.316

(1.51)

(1.27)

(1.57)

(1.57)

N

330

330

330

330