变量

(1)

(2)

(3)

(4)

(5)

(6)

PEC

Grenov₁

PEC

Grenov₂

PEC

Grenov₃

CEPI

0.094^**

(2.186)

0.094^**

(2.186)

0.094^**

(2.186)

PEC

0.082^**

(2.287)

0.069^**

(0.653)

0.076^***

(1.936)

Constant

5.382^***

(3.856)

3.527^***

(4.037)

6.195^***

(3.856)

7.838^***

(4.132)

5.491^***

(3.621)

6.042^***

(4.386)

X_it

Yes

Yes

Yes

Yes

Yes

Yes

Company

Yes

Yes

Yes

Yes

Yes

Yes

Year

Yes

Yes

Yes

Yes

Yes

Yes

N

11,534

11,534

11,534

11,534

11,534

11,534

R²

0.482

0.539

0.567

0.485

0.691

0.563