Deterministic six-subject panel with measurements at steps 0, 1 and 3.
The panel has 17 subject-step rows: one absent row at step 3 and
two explicit missing (NA) outcomes.
Deterministic six-subject panel with measurements at steps 0, 1 and 3.
The panel has 17 subject-step rows: one absent row at step 3 and
two explicit missing (NA) outcomes.