We've all seen the older residential neighborhoods near (usually) larger colleges. These areas generally have older housing stock that is cut-up into 3,4 or even 6 unit buildings. As more and more apartments are added, the quality of the neighborhood decreases and more homeowners move away. As prospective homeowners don't want to live in these areas either, more apartments are added and the cycle continues.
This link shows how Winona, MN is trying to limit the number of rental properties to 30% per block. Can this strategy be copied or is it even the best way to deal with this type of neighborhood deterioration?