Investigating the Spatiotemporal Disparity and Influencing Factors of Urban Construction Land Utilization Efficiency: Empirical Evidence from Panel Data of China

Table 3

Evaluation index of urban construction land utilization efficiency in China.

Indicators	Variables	Definition
The total factor production factor input	Urban construction land	Urban construction land area
	Capital	Fixed capital stock
	Labor	Number of urban employees at the end of the year
	Energy	Million tons of standard coal
Expected output	Economics	The output value of the secondary and tertiary industries
	Sociology	Disposable income of urban residents
	Ecology	The urban green space area
Unexpected output	Ecology	Industrial sulfur dioxide emission
		Discharge of industrial wastewater
		Discharge of industrial solid waste