Table 6 Analysis of regulating effect of CRWS in the YRDUA based on urbanization level heterogeneity.

From: Evaluation of synergistic and regulatory effects of carbon-reduction and water-saving in the Yangtze River Delta Urban Agglomeration

Variable

High urbanization rate cities

Medium urbanization rate cities

Low urbanization rate cities

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

WU

0.029

(1.096)

  

0.052*

(1.624)

  

0.091*

(1.891)

  

WS

 

0.058**

(2.446)

  

-0.002

(-0.281)

  

0.004

(0.516)

 

EW

  

0.007*

(1.630)

  

-0.028**

(-2.000)

  

-0.019

(-0.550)

ECI

0.033**

(2.425)

0.003

(0.337)

0.010

(0.812)

0.047***

(2.967)

0.014*

(1.883)

0.010

(1.003)

0.020

(1.090)

0.014

(1.407)

0.006

(0.609)

ECS

0.284

(1.493)

0.776***

(2.798)

0.154

(0.972)

0.119

(0.532)

0.155

(1.118)

-0.166

(-1.010)

0.257

(1.152)

0.182

(1.234)

-0.034

(-0.183)

IS

-0.002

(-0.791)

0.002

(1.737)

0.004***

(2.800)

0.006***

(3.122)

0.003***

(3.463)

0.004***

(3.601)

0.005***

(2.904)

0.004***

(4.296)

0.005***

(4.225)

IIS

-0.002

(-0.258)

0.002

(0.201)

0.011**

(2.509)

-0.004

(-0.912)

0.001

(0.144)

-0.008**

(-2.197)

-0.021**

(-2.532)

-0.015**

(-2.290)

-0.028***

(-4.526)

WU*ECI

-0.003*

(-1.661)

  

-0.007*

(-1.871)

  

-0.004

(-0.772)

  

WU*ECS

-0.067**

(-2.161)

  

-0.030

(-0.593)

  

-0.066

(-1.066)

  

WU*IS

0.001***

(2.778)

  

0.001

(-0.803)

  

-0.001

(-0.881)

  

WU*IIS

0.001

(0.671)

  

0.001

(1.165)

  

0.003*

(1.713)

  

WS*ECI

 

0.000

(0.121)

  

0.001

(0.781)

  

-0.001

(-0.443)

 

WS*ECS

 

-0.075**

(-2.016)

  

-0.008

(-0.761)

  

-0.005

(-0.613)

 

WS*IS

 

-0.001

(-0.221)

  

0.001**

(2.448)

  

-0.001

(-0.030)

 

WS*IIS

 

-0.001

(-0.110)

  

-0.001

(-0.493)

  

0.001

(0.542)

 

EW*ECI

  

-0.001

(-0.568)

  

0.001

(0.744)

  

0.001

(0.447)

EW*ECS

  

-0.011*

(-1.619)

  

0.023

(1.084)

  

0.031

(0.590)

EW*IS

  

0.001

(1.587)

  

0.001

(0.588)

  

-0.001*

(-1.685)

EW*IIS

  

-0.001**

(-2.309)

  

0.001**

(2.588)

  

0.003***

(3.195)

Constant

-0.098

(-0.614)

-0.492**

(-2.581)

-0.145

(-1.251)

-0.284*

(-1.707)

-0.122

(-1.309)

0.127

(1.169)

-0.290*

(-1.713)

-0.113

(-0.963)

0.052

(0.412)

Adjust R2

0.827

0.485

0.744

0.713

0.638

0.691

0.595

0.496

0.542

F test

23.938***

35.345***

14.517***

24.829***

17.619***

22.378***

13.203***

8.872***

10.645***

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