The Method of Measuring the Agglomeration Degree of High-Tech Industries and Its Influence Mechanism: Taking Guangdong Province as an Example

Table 3

Variable table of influencing factors of high-tech industry agglomeration.

First-level index	Second-level index	Third-level index
Marshall externalities	International trade	Total foreign import and export (X1)
		Actual use of foreign direct investment amount (X2)
	Knowledge spillover	Whole society R&D investment (X3)
		Number of patent applications granted (X4)
	Labor pool	Total number of employees (X5)
		R&D personnel of industrial enterprises above designated size (X6)
New economic geography	Transportation cost	Highway mileage (X7)
	Economies of scale	Regional GDP (X8)
	Communication level	Total post and telecommunications business (X9)
Government actions	Local tax	Local general public budget revenue (X10)
	Local industrial investment	Proportion of industrial investment in each city (X11)
	Local technology investment	Proportion of local science and technology appropriations in fiscal expenditure (X12)