Table 2

ADF and Phillips-Perron tests results

Variable(C, T, L)*ADF t – statisticPP t - statistic1% level5% levelConclusions
LNPVN(1,1,13)−1.618734−1.843602−4.013946−3.436957Non-stationary
DLNPVN(1,1,13)−11.19394−11.19067−4.014288−3.437122Stationary
LNEX(1,1,13)−0.258259−1.352345−3.469933−2.878829Non-stationary
DLNEX(1,1,13)−10.36336−10.26842−3.469933−2.878829Stationary

Note(s): *C is constant or intercept, T is trend and L is lag selection. D represents the first-order difference to the time series

Source(s): Calculated by author's using Eviews

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