Table 2.

Statistics of intercity heterogeneity in random-effect models

		Cochran Q test		I2	Information criteria
		Q	P	%	AIC	BIC
Temperature
	Intercept only	210.38	0.000	52.50	− 234.40	− 65.07
	Latitude	182.66	0.000	50.70	− 139.65	47.83
	Urban population	179.56	0.000	49.90	− 111.16	76.32
	AYE	197.18	0.000	54.40	− 150.00	37.48

AIC, Akaike information criterion; BIC, Bayesian information criterion; AYE, average years of education per capita