Exploring the Node Importance and Its Influencing Factors in the Railway Freight Transportation Network in China

Table 2

Descriptive statistics of the variables.

Variable	No. of Obs	Mean	Std. Dev	Min	Max	Unit
Hub	372	0.03	0.12	0	0.7467788	Unit
PageRank	372	0.03	0.02	0	0.0865906	Unit
Provincial PopDen	372	0.04	0.06	0.0002329	0.3825895	Ten thousand people per square kilometer
Provincial GDP	372	15502.66	14390.62	248.8	80854.91	Billion RMB
Highway density	372	0.79	0.48	0.0363449	2.097461	Kilometers per square kilometer
Provincial fixed asset investments	372	829.51	665.11	32.48	3737.95	Billion RMB
RFC	372	0.09	0.01	0.0835294	0.1228885	Unit
Longitude	372	111.94	8.78	87.56499	126.6577	Unit
Latitude	372	33.37	6.61	20.02207	45.77322	Unit
Coastal region	372	0.35	0.48	0	1	Dummy
YEZ	372	0.35	0.48	0	1	Dummy
SREB	372	0.29	0.45	0	1	Dummy
Resource-based province	372	0.23	0.42	0	1	Dummy
Crisis	372	0.17	0.37	0	1	Dummy
The “new normal” economic model	372	0.25	0.43	0	1	Dummy