Granger causality Wald tests
+------------------------------------------------------------------------+
| Equation Excluded | F df df_r Prob > F |
|--------------------------------------+---------------------------------|
| d2 d4 | 7.7549 2 23 0.0027 |
| d2 ALL | 7.7549 2 23 0.0027 |
|--------------------------------------+---------------------------------|
| d4 d2 | 7.6571 2 23 0.0028 |
| d4 ALL | 7.6571 2 23 0.0028 |
+------------------------------------------------------------------------+