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Table 4 Results of robustness test (with changed time widths)

From: Evaluating the CO2 abatement effects of low-carbon city policy in China: a quasi-natural experiment

 

Model (1)

Model (2)

Model (3)

Model (4)

Model (5)

Model (6)

du × dt

0.0088**

0.0138***

0.0144***

0.0116**

0.0142***

0.0088**

(0.0043)

(0.0044)

(0.0049)

(0.0058)

(0.0044)

(0.0044)

Constant

1.5154***

1.5054***

1.5704***

1.3044***

1.4580***

1.7719***

(0.1190)

(0.1190)

(0.1514)

(0.1494)

(0.0989)

(0.0888)

City FE

YES

YES

YES

YES

YES

YES

Year FE

YES

YES

YES

YES

YES

YES

Control variables

YES

YES

YES

YES

YES

YES

Time window

2006–2014

2007–2015

2008–2013

2009–2015

2007–2016

2003–2015

Obs

2538

2538

1692

1974

2820

3666

R2

0.117

0.113

0.134

0.102

0.113

0.365

F

19.7714

19.1189

18.0500

14.6024

20.1344

101.9827

  1. Notes: (1) ***, **, * indicate that the levels of significance are at 1%, 5% and 10%, respectively
  2. (2) Figures in the parentheses are standard errors