China’s Spatial Economic Network and Its Influencing Factors

Table 8

Variable selection for QAP analysis.

Variables	Signification	Data processing
BOU	Whether provinces are adjacent	Build a binary matrix
IDM	Distance matrix between provinces	Take the distance between the provincial capitals as the standard
PAG	Per capita GDP	Calculate the difference between the provinces after standardized processing
FI	Foreign investment
FIE	The number of foreign-invested enterprises
PSI	The proportion of the added value of the secondary industry
PTI	The proportion of added value of tertiary industry
PRA	Proportion of road area
LMS	Labor market size	After normalization and difference, the matrix is converted into a 0-1 matrix with the row mean value as the threshold
NHW	The number of health personnel