Table 5 Endogeneity test regression results.

From: Digital infrastructure construction and the development of new-quality productive forces in enterprises

Variable

DID

NQP

DID

NQP

IV

0.339***

 

0.0984***

 

(66.43)

(86.26)

DID

 

0.0972***

 

0.0748***

(12.25)

(9.46)

size

0.0181***

0.0314***

0.0064

0.0361***

(3.85)

(12.50)

(0.88)

(4.92)

sale

0.001

-0.0177***

-0.0005

-0.014**

(0.27)

(-7.85)

(-0.10)

(-2.07)

cflow

-0.0605**

0.523***

-0.0156

0.563***

(-2.54)

(22.11)

(-0.68)

(13.95)

age

-0.0565**

-0.0381***

-0.108**

0.0013

(-2.44)

(-7.14)

(-2.53)

(0.12)

growth

-0.001

-0.0026*

-0.0001

-0.005

(-0.67)

(-1.75)

(-0.08)

(-1.58)

top10

-0.001***

-0.0004***

-0.0003

-0.0007***

(-5.76)

(-4.20)

(-1.38)

(-2.79)

roa

-0.0571**

-0.271***

-0.0016

-0.378***

(-2.01)

(-9.54)

(-0.05)

(-7.52)

lev

0.0425***

-0.0833***

-0.0112

-0.134***

(3.12)

(-8.85)

(-0.56)

(-5.14)

_cons

0.263***

0.274***

0.483***

0.0451

(2.79)

(9.03)

(2.90)

(0.57)

Firm

YES

YES

YES

YES

Year

YES

YES

YES

YES

N

29,036

29,036

25,160

25,163

r2

0.842

0.0383

0.903

0.0618