Table 4

Unit root test results

ADF test
VariableLevelFirst difference
Probability valueProbability value
CPI0.56390.0000
EXR0.06060.0000
LGDP0.45980.0000
INT0.05870.0014
LJSE150.23590.0000
Phillips-Perron test
CPI0.57950.0000
EXR0.14640.0000
LGDP0.50360.0000
INT0.25260.0011
LJSE150.21320.0000
KPSS test
VariableLevel
Asymptotic critical value at 5% levelKPSS test statistic
CPI0.14600.2768
EXR0.14600.1340
LGDP0.14600.2933
INT0.46300.3488
LJSE150.14600.1585
VariableFirst difference
Asymptotic critical value at 5% levelKPSS test statistic
CPI0.14600.0653
EXR0.14600.0403
LGDP1.14600.0625
INT0.46300.0804
LJSE150.14600.0658

Note(s): All variables tested with constant and trend except INT which is tested with constant only

Source(s): Authors' computation

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