From the article:
"One of the challenges of estimating the consequences of Wal-Mart entry is that the store does not choose its locations randomly but decides based on certain characteristics of different communities. If these characteristics are associated with particular deficiencies in social capital, this could give the appearance that Wal-Mart is degrading communities when, in actuality, its arrival is merely an indicator of a community having diminished levels of social capital."
So basically if you're neighborhood were to get a Wal-Mart does that mean it is kind of crappy and is going down? Should the arrival of a Wal-Mart be treated with the same bittersweet glee of seeing a super dollar store come into your neighborhood?
Seriously though, I was always concerned when I saw a Wal-Mart go up over a Target.