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

Table 5

Robustness test results of digitalization on green innovation performance.

	Digitization of one-order lag	Digitization of two-order lag	Changing digital measurement methods	High-regional system	Low-regional system
	0.1290; (3.86)	0.1078; (3.46)	0.1394; (4.02)	0.1796; (3.78)	0.1882; (4.43)
D	0.2895; (5.43)	0.1185; (2.56)	0.0839; (5.00)	0.2535; (4.06)	0.3490; (2.87)
	YES	YES	YES	YES	YES
	0.6583; (10.72)	0.5983; (9.65)	0.6058; (9.08)	0.6659; (9.27)	0.9293; (11.40)
	0.000	0.000	0.000	0.000	0.000
	0.392	0.136	0.524	0.139	0.182
	0.336	0.829	0.470	0.932	0.350