变量

ln_ETS

缩尾5%

缩尾10%

加入个体固定效应和 时间趋势的交互项

改变事件发生年份

(1)

(2)

(3)

(4)

Post_treated

0.125^**

0.147^***

0.122^**

0.382^***

(0.058)

(0.057)

(0.054)

(0.103)

LC

−0.000^***

−0.000^***

−0.000^***

−0.000^***

(0.000)

(0.000)

(0.000)

(0.000)

FDI

0.012

0.010

0.019^*

0.018^*

(0.009)

(0.009)

(0.010)

(0.010)

ln_LSQ

−0.082

−0.001

0.237^**

−0.213

(0.120)

(0.118)

(0.108)

(0.132)

ln_PGDP

2.054^***

2.094^***

1.104^***

1.877^***

(0.166)

(0.163)

(0.197)

(0.181)

Post_treated1

−0.363^*

(0.170)

Post_treated2

−0.015

(0.141)

constant

5.944^***

4.627^**

−106.46

9.126^***

(0.003)

(1.938)

(66.303)

(2.159)

个体固定效应

Yes

Yes

Yes

Yes

时间固定效应

Yes

Yes

Yes

Yes

N

496

496

496

496

调整后的R²

0.610

0.622

0.220

0.596