Table 10 Robustness test results.

From: How does the digital economy enhance carbon emission efficiency in the logistics industry? Empirical evidence from 30 Chinese provinces

 

(1)

(2)

(3)

(4)

(5)

DE

0.458***

(0.162)

1.552***

(0.482)

2.758***

(0.896)

2.423***

(0.915)

2.766***

(0.846)

DE2

-0.067**

(0.029)

-1.714***

(0.539)

-2.376**

(1.100)

-2.750***

(0.979)

-2.501***

(0.928)

Control variable

Yes

Yes

Yes

Yes

Yes

Year

Yes

Yes

Yes

Yes

Yes

Province

Yes

Yes

Yes

Yes

Yes

Constant

1.607***

(0.427)

1.363***

(0.259)

3.328***

(0.616)

1.405***

(0.529)

3.657***

(1.329)

R2

0.863

0.812

0.846

0.878

0.861

  1. *Robust standard errors are reported in parentheses. ***p < 0.01, **p < 0.05, *p < 0.10.
Back to article page