Table 1 Unit root tests
From: A cointegrating stock trading strategy: application to listed tanker shipping companies
Variable | ADF | PP |
|---|---|---|
Levels | ||
  ln BTt | −1.14 | −0.95 |
  ln Pt | −0.67 | −0.66 |
First Differences: | ||
 ∆ ln BTt | −14.39*** | −15.15*** |
 ∆ ln Pt | −19.73*** | −19.75*** |