Table 6.

Findings of unit root test.

Variables	CIPS		CADF
	Level	First difference	Level	First difference
lnCO2	−1.254	−3.321***	−2.432	−4.687***
lnTG	−2.895	−4.902***	−1.569	−4.045***
lnER	−1.432	−3.655***	−2.164	−5.186***
lnEG	−2.857	−5.672***	−2.287	−3.342***
lnP	−3.190	−5.769***	−3.113	−5.590***
lnU	−1.461	−3.474***	−2.492	−3.726***
lnTR	−2.674	−4.921***	−2.267	−4.591***