Table 3 Heterogeneity analysis results.

From: Mechanism of smart city policy on the carbon emissions of construction enterprises in the Yangtze River Economic Belt: a perspective of the PESTEL model and the pollution halo hypothesis

 

(1)

(2)

(3)

Watersheds

Upstream

Midstream

Downstream

Dependent variable

CO2

CO2

CO2

DID

−0.180***

0.146**

−0.045**

 

(−6.18)

(2.02)

(−2.20)

_cons

−0.335***

−0.060

0.530***

 

(−10.86)

(−0.79)

(25.75)

Control

Yes

Yes

Yes

N

1980

1980

1980

R2

0.7712

0.2792

0.7297

  1. Values in parentheses are standard errors.
  2. ** and *** indicate significance at 5% and 1%, respectively.
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