Eco-Efficiency Measurement of Green Buildings and Its Spatial and Temporal Differences Based on a Three-Stage Superefficient SBM-DEA Model

Table 2

External environmental variables for eco-efficiency in green buildings.

	Variable name	Variable values	Variable description
Environment variables	Economic level	GDP per capita (billion yuan)	Measuring the impact of the level of regional economic development
	Urban share	Urban population share of total population (%)	Measuring the impact of regional urbanization level
	Technology support	Regional investment in science share of fiscal expenditure (%)	Measuring the impact of green technology support and R&D
	Energy structure	Coal consumption share of total energy consumption (%)	Measuring building energy consumption preferences