I'm not sure. Each individual TJ's and especially WF store is much larger than the grocery section of an individual CVS. Even the smallest TJ's I've been in (

I'm not sure. Each individual TJ's and especially WF store is much larger than the grocery section of an individual CVS. Even the smallest TJ's I've been in (Back Bay) is larger than the largest CVS grocery section I've been in (3 aisles?). I would expect the per-store figure to be obviously in TJ's/WF's favor. I feel like the most appropriate metric would control for total population served (to discount both the fact that WF and TJ's don't exist everywhere CVS does, and that there are more CVSes per capita than the others where two or more of the three exist).