Table 1 Summary statistics.

From: The impact of China’s artificial intelligence development on urban energy efficiency

Type of variables

Variables

N

Mean

Sd

min

max

Dependent variable

Energy efficiency

4177

0.54

0.14

0.27

0.99

Explanatory variable

Artificial intelligence development

4177

4.12

1.79

0

10.37

Mediating

variable

Green technology innovation

4177

4.30

1.87

0

10.25

Industrial structure rationalization

4177

0.28

0.21

−0.03

1.72

Moderating variable

Informal environment regulation

4177

0.18

0.06

0.07

0.88

Stage of resource-based city

1681

2.35

0.86

1

4

Control variable

Population density

4177

5.73

0.93

0.68

7.88

Industry structure

4177

0.40

0.10

0.09

0.84

Per capita GDP

4177

10.45

0.72

4.61

13.06

Sulfur dioxide

4177

10.14

1.27

1.10

13.43

Total energy consumption

4177

13.67

1.27

9.30

17.53

  1. The VIF value for EE, AI and control variables range from 1.28 to 4.83, the mean VIF is 2.69. There is no significant multicollinearity problem among the variables.
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