Analyzing the Coupling Coordination among Economic, Social, and Environmental Benefits of Urban Infrastructure: Case Study of Four Chinese Autonomous Municipalities

Table 6

Results of panel unit root tests.

	Series	Fisher ADF		Fisher PP		IPS
		Constant	Trend and Constant	Constant	Trend and Constant	Constant	Trend and Constant
Levels	H	30.236	19.080	29.071	24.661	-4.204	-2.074
	U1	17.6232^∗∗	21.3026^∗∗∗	17.4442^∗∗	39.7420^∗∗∗	-1.8874^∗∗	-2.7089^∗∗∗
	U2	33.4052^∗∗∗	17.2087^∗∗	42.8772^∗∗∗	50.6987^∗∗∗	-4.5573^∗∗∗	-1.9947^∗∗
	U3	22.9888^∗∗∗	34.5616^∗∗∗	12.3602	34.5286^∗∗∗	-2.7217^∗∗∗	-6.7449^∗∗∗
First difference	H	36.6378^∗∗∗	25.8390^∗∗∗	47.2893^∗∗∗	48.8948^∗∗∗	-5.7703^∗∗∗	-2.3682^∗∗∗
	U1	40.0063^∗∗∗	33.4023^∗∗∗	55.6334^∗∗∗	62.5841^∗∗∗	-5.8070^∗∗∗	-4.3860^∗∗∗
	U2	32.4436^∗∗∗	22.3941^∗∗∗	59.2405^∗∗∗	48.7459^∗∗∗	-4.3216^∗∗∗	-2.1093^∗∗
	U3	51.7019^∗∗∗	41.8429^∗∗∗	64.4322^∗∗∗	52.4095^∗∗∗	-10.8196^∗∗∗	-7.0836^∗∗∗

Note: Lags are all selected automatically by AIC and SC standard.
significant at confidence level 10%.
significant at confidence level 5%.
significant at confidence level 1%.