I'm curious if anyone has done any analysis on the "other Walmart" phenomenon -- when there are two walmarts (or malls) in a given area, one of them (the older

I'm curious if anyone has done any analysis on the "other Walmart" phenomenon -- when there are two walmarts (or malls) in a given area, one of them (the older one, usually) rapidly gets far worse. Overall, it seems like it gets worse than it would have on its own, and worse than simply removing customers. What amazes me is that this happens even in suburban/rural locations where everyone drives to the stores, so going from the bad store to the good store is at most the direct-drive distance between them (sometimes just a couple of minutes). Why would anyone at all continue to go to the bad one?