Table 8 Others robust test.

From: Endowing urban business environments with an intelligent brain: empirical evidence from cities in western China

 

(1)

(2)

(3)

(4)

BE

did

BE

BE

did

0.005*

 

0.237***

0.005**

(1.754)

 

(3.757)

(2.315)

kdDID

0.001

   

(0.432)

   

City topographic variation

 

0.076***

  
 

(0.018)

  

Constant

0.078

 

0.031

-0.014

(1.021)

 

(0.235)

(-0.365)

Control variables

Yes

Yes

Yes

Yes

City fixed effects

Yes

Yes

No

No

Year fixed effects

Yes

Yes

Yes

Yes

Province fixed effects

No

Yes

Yes

No

N

1312

1312

1312

1179

R2

0.549

0.358

 

0.400

  1. The first column includes the “Broadband China” policy as a control variable. The second and third columns show the first and second stages of the instrumental variable method, respectively. The fourth column presents the regression results after winsorizing continuous variables.
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