Null Hypothesis: APD has a unit root

Exogenous: Constant

Lag Length: 0 (Automatic - based on SIC, maxlag = 7)

t-Statistic

Prob.*

Augmented Dickey-Fuller test statistic

−5.131255

0.0002

Test critical values:

1% level

−3.670170

5% level

−2.963972

10% level

−2.621007