Variable

ADF value of original sequence

P value of original sequence

ADF value of first difference

P value of first difference

Conclusion

LnEUA

−2.283201

0.1792

−8.186274

0.0000

I (1)

LnECOI

−2.248668

0.1906

−4.697101

0.0002

I (1)

LnCOAL

−2.256970

0.1878

−5.989244

0.0000

I (1)

LnGAS

−2.753237

0.0683

−10.00783

0.0000

I (1)

LnOIL

−1.415176

0.5726

−7.671850

0.0000

I (1)

LnPOWER

−2.831189

0.0570

−12.92583

0.0000

I (1)