Null Hypothesis: ET has a unit root

Exogenous: None

Lag Length: 0 (Automatic based on SIC, MAXLAG=2)

t-Statistic

  Prob.*

Augmented Dickey-Fuller test statistic

-7.430109

0.0000

Test critical values:

1% level

-2.593121

5% level

-1.944762

10% level

-1.614204

*MacKinnon (1996) one-sided p-values.