Table 9 Traditional infrastructure heterogeneity.

From: The impact of digital infrastructure on regional green innovation efficiency through industrial agglomeration and diversification

Variables

GIE

Low level traditional infrastructure

High-level traditional infrastructure

DI

0.116

0.566***

 

(0.92)

(5.56)

WDI

3.093

−2.483

 

(1.41)

(−1.29)

Control Variables

YES

YES

ρ

0.860***

0.484

 

(5.25)

(1.63)

N

1120

1128

R2

0.116

0.115

  1. *** indicate significance at 1% level, respectively; Figures in parentheses are z-values.
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