Industrial Agglomeration Analysis Based on Spatial Durbin Model: Evidence from Beijing-Tianjin-Hebei Economic Circle in China

Table 1

Variable name, symbol, and description.

Variable name	Index	Symbol	Description
Explained variable	Industrial agglomeration	Y	Industrial added value/GDP
Explanatory variable	Financial development	X1	Financial added value
	Technological innovation	X2	Number of invention patent applications
Control variable	Government action	Z1	Public expenditure/GDP
	Human capital	Z2	Number of college students/resident population
	Capital input level	Z3	Fixed capital investment/GDP