Spatiotemporal Evolution Pattern and Driving Factors of Higher-Education Population in China

Table 2

Factors.

	Factors	Abbreviation	Description
1	City location	CL	Provincial capitals: 1, cities adjacent to provincial capitals: 2, other cities: 3
2	City size	CS	Urban built-up areas
3	High-speed railway	HSR	Distance from the high-speed railway
4	Highway	HW	Quantity of expressway exits in the region
5	Average slope	SP	Average slope of the region (°)
6	Average elevation	EL	Average elevation of the region (m)
7	Gross domestic product	GDP	Gross domestic product density (1000 ¥/km^2)
8	Nonagricultural population	NAP	Proportion of nonagricultural population to the total population (%)
9	Population density	TPD	Total population density (person per km^2)