Table 2 Difference-in-difference model (DID) regression results.

From: Government intervention, industrial structure, and energy eco-efficiency: an empirical research on new energy demonstration in cities

 

DID

(1)

(2)

(3)

(4)

\(du \times dt\)

0.0505*** (0.0195)

0.0461*** (0.0173)

0.0385*** (0.0146)

0.0252*** (0.0076)

\(du\)

− 1.1841*** (0.0832)

− 1.1816*** (0.0743)

− 0.9266*** (0.0646)

− 0.3238*** (0.0341)

\(dt\)

0.2571*** (0.0212)

0.1951*** (0.0236)

0.1613*** (0.0203)

− 0.3115*** (0.0331)

LnFE

 

0.0827*** (0.0309)

0.0785*** (0.0256)

0.0491*** (0.0126)

LnIND

  

0.0191* (0.0106)

0.0092* (0.0055)

LnPGDP

   

0.3213*** (0.0246)

LnURBAN

   

− 0.0402** (0.0182)

LnFDI

   

0.0109*** (0.0020)

LnTI

   

0.0166*** (0.0063)

Constant

− 0.8164*** (0.0603)

− 0.5893*** (0.0928)

− 0.5842*** (0.0788)

− 3.4439*** (0.2339)

Year fixed effects

Yes

Yes

Yes

Yes

City fixed effects

Yes

Yes

Yes

Yes

Observations

3540

3540

3540

3540

\(R^{2}\)

0.6694

0.7070

0.7427

0.7630

  1. The values in parentheses refer to the standard error values of the regression coefficients; ***, **, and * refer to the significance levels of 1%, 5%, and 10%, respectively.
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