Table 5 Main effects of ICT investment on carbon emission efficiency.

From: ICT investment and carbon emission efficiency in regional port groups: evidence from Chinese coastal provinces

Variable

(1)

(2)

(3)

(4)

CEE

CEE

CEE

CEE

LnICT

0.145***

   
 

(3.83)

   

LnHW

 

0.168***

  
  

(3.66)

  

LnCW

  

0.146***

 
   

(4.27)

 

LnSW

   

0.057***

    

(2.67)

R&D

1.807**

1.822**

1.935**

0.715

 

(2.11)

(2.23)

(2.37)

(0.85)

Urba

−1.829**

−2.027***

−2.102***

−1.477**

 

(−2.63)

(−2.88)

(−2.98)

(−2.18)

Gov

−1.432

−1.715

−1.804

−0.265

 

(−1.23)

(−1.53)

(−1.53)

(−0.24)

Str

0.007

0.066

0.085

0.005

 

(0.06)

(0.60)

(0.76)

(0.03)

_cons

0.793

1.041*

1.009*

1.362**

 

(1.39)

(1.97)

(1.88)

(2.31)

Year

Yes

Yes

Yes

Yes

Individual

Yes

Yes

Yes

Yes

N

108

108

108

108

r2_within

0.263

0.271

0.280

0.196

F

6.300***

5.590***

6.180***

6.290***

  1. t-Statistics in parentheses, *p < 0.1, **p < 0.05, ***p < 0.01.