Table 4 Fisher-type unit-root test Based on Phillips–Perron tests at a level.

From: Examining public private partnership investment in energy towards achieving sustainable development goal 7 for ASEAN region

Variable

P-value

Lag(s)

Time trend

lnPPPIE

0.0005

1

Included

lnACKG

0.00

1

Included

lnEI

0.6285

1

Included

lnREO

0.393

1

Included

lnGDPRATE

0.00

1

Included

lnGHG

0.9847

1

Included

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