Table 6 Results of negative binomial regression.

From: Industry policies and technological innovation in artificial intelligence clusters: are central positions superior?

Variable

TI

Model 1

Model 2

Model 3

IP

 

0.512***

0.511***

 

(26.434)

(26.653)

NC

  

−0.100***

  

(−2.608)

IP*NC

  

−0.045*

  

(−1.839)

ED

1.339***

0.722***

0.834***

(5.337)

(4.511)

(4.919)

IC

0.551***

0.143

0.166

(3.517)

(1.374)

(1.564)

IE

0.415***

0.277***

0.299***

(4.857)

(4.784)

(5.039)

CONSTANT

−21.529***

−11.332***

−11.831***

(−9.530)

(−7.263)

(−6.953)

Cluster FE

Yes

Yes

Yes

Observation

290

290

258

  1. Notes: *, **, and *** indicate significance at the 10%, 5%, and 1% levels, respectively. Z scores are shown in parentheses. The results are estimated by using Stata software.
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