The Impact of Digitization on Green Innovation Performance: Evidence Based on Panel Data of 228 Prefectural-Level Cities in China

Table 4

The heterogeneity test results.

Variable	By geographical location		By economic
			Region
	Eastern cities	Midwest cities	Central cities	Outer cities
	0.1520	0.1784; (4.95)	0.4232; (3.74)	0.1285; (3.87)
	(2.86)
	0.2645	0.1407; (1.94)	0.2537; (2.16)	0.2901; (4.32)
	(3.21)
	YES	YES	YES	YES
	0.8075; (10.13)	0.6110; (8.82)	0.6117; (5.12)	0.7153; (8.37)
	0.000	0.000	0.002	0.000
	0.565	0.546	0.943	0.784
	1.000	1.000	1.000	0.47