Research on the Hierarchical Spatial Structure of the Urban Agglomeration of the Yellow River Ji-Shaped Bend

Table 1

Evaluation index system and variable definition of city comprehensive power.

The target layer	First level	Second level
Attractiveness	Centrality	Indegree centrality
Economic	Economic force	GDP per capita
		Proportion of the tertiary industry
	Economic vitality	Number of commercial banks
		Number of listed companies
Social science and technology culture	Living standard	Total retail sales of consumer goods
	Workforce	Total population
	Social vitality	Baidu Index (average day)
	Public service	Investment in fixed assets
	Science and technology culture	Number of universities per 10,000 people
		Number of patents per 10,000 people
		Number of museums per 10,000 people