Universe
If base wave: COR18=5,6 & if COR20= 5 or = 6 OR COR19=2 (if main job/activity as of the end of February 2020: wage worker) & (if main job/activityduring past month: wage worker)
If panel: COR20= 5 or = 6 (if main job/activityduring past month: wage worker)