Variable name

(1) IPG1

(2) IPG2

(3) IPG1

(4) IPG2

TFP_OP

TFP_OP

Posc

0.0530^**

0.0532^**

(2.17)

(2.18)

Pop

−0.162^**

−0.162^***

(−2.74)

(−2.74)

IPG

0.00454^***

0.00289^***

0.00241^***

0.00154^***

(5.00)

(5.03)

(5.71)

(5.77)

IPG*Posc

−0.00179^**

−0.00113^**

(−2.19)

(−2.19)

IPG*Pop

0.00242^***

0.00153^***

(3.49)

(3.43)

IPG²

−0.0000129^***

−0.0000052^***

−0.00000817^***

−0.00000328^***

(−3.77)

(−3.76)

(−3.16)

(−3.19)

Constant

1.167^***

1.166^***

1.226^***

1.224^***

(3.84)

(3.84)

(5.00)

(4.99)

Control

Yes

Yes

Yes

Yes

Year/Industry

Yes

Yes

Yes

Yes

Sample size

5260

5260

5260

5260

adj.R²

0.188

0.189

0.183

0.183