Table 4 Collinearity test and regression model estimation results

(Constant)

4.237

0.000

GDP per capita

0.044

1.725

0.077

0.275

3.633

Population density

0.130

3.876

0.000^***

0.255

3.917

Road network density

0.042

1.934

0.053^**

0.617

0.620

Number of hotels and B&Bs

0.102

3.988

0.000^***

0.445

2.247

Perfection of public service facilities

0.026

1.754

0.083^*

0.319

3.134

Number of cultural institutions

0.110

4.767

0.000^***

0.543

1.840

Elevation

0.087

3.174

0.002^***

0.383

2.613

Precipitation

0.055

2.283

0.022^**

0.500

1.999

Distance from water

0.021

1.107

0.268

0.790

1.266

Forest cover rate

0.188

5.123

0.000^***

0.215

4.661

Ecological land connectivity

0.108

2.762

0.006^***

0.190

5.268

R²

0.179

Adjustment R²

0.176

F-value

56.194

P

0.000^***