Research on the City Network Structure in the Yellow River Basin in China Based on Two-Way Time Distance Gravity Model and Social Network Analysis Method

Table 1

Main sources of data studied in this paper.

Data type	Data source	Value determination method and unit of data
(1) Highway commuting time	Consulting Google Maps, the point-to-point transportation time between city centers	Minutes
(2) Railway commuting time	Consulting the website of China Railway Customer Service Center	Minutes
(3) Economic, social, and demographic data of cities	The 2019 China City Statistical Yearbook and the statistical yearbooks of the provinces or autonomous regions	GDP: RMB 100 million yuan Population: 10 thousand people
(4) Transfer experience of mayors, deputy mayors, and secretaries of municipal CPC party committees among cities in the river basin	Information of officials from the official websites of China’s national and provincial governments, People’s Daily Online, Xinhua Net, and local chronicles of cities	With transfer experience = 1 Without transfer experience = 0

Note: the data are used for later analysis. The secretary of a municipal CPC party committee is the highest leader of the Communist Party of China in the city, and his/her power is generally greater than that of the mayor.