Table 2 Results of unit root test by PP...

Table 2

Results of unit root test by PP và KPSS

Series	Frequency	PP	KPSS
GDP	Quarterly	−3.206**	0.344
INF	Monthly	−5.392***	0.263
VOP	Monthly	−6.565***	0.290
OPP	Daily	−46.072***	0.234
OPN	Daily	−45.863***	0.271

Note(s): ***, ** denotes significant level at 1% and 5% respectively

Source(s): Authors