How Do Different Types of Environmental Regulations Affect Green Innovation Efficiency?

Table 4

Unit root test results.

ADF test	GI-T	CER	MER	VER
Z statistics ( value)	−2.706271 (0.0959)	−4.195934 (0.0243)	−2.859138 (0.0724)	−4.480887 (0.0151)

Significance level is 5% and significance level is 10%.