Table 2 Descriptive statistics results.

From: Research on the impact of transportation infrastructure construction on urban sustainable development

Variable type

Variable

Sample size

Mean

Standard deviation

Minimum​

Median

Max value

Explained variable

Sustainable economic development

4221

0.0629

0.0622

0.0167

0.0446

0.681

Explanatory variables

Transport infrastructure

4221

1.454

1.874

0.0552

0.968

55.45

Control variables

Level of external opening up

4221

3.094

11.70

0

0.453

299.7

Dependence on foreign capital

4221

0.0027

0.0030

0

0.00180

0.0473

Degree of government intervention

4221

81.50

294.2

2.010

61.43

18,700

Human capital level

4221

7.189

235.0

0.123

0.491

11,500

Intermediate variable

Technological innovation

4221

0.674

1.601

0

0.168

27.92

Employment scale

4221

55.15

83.14

4.330

32.35

951.9