Here's an article about vacant property in Ann Arbor.
Now, these houses just didn't become abandoned. Rather the vacant properties are victims of failed development. There was a multi-story building proposed where these vacant houses stand and I recall them occupied before this development happened.
The project received alot of criticism from area residents.
I think there is possibly another side of the story
http://annarbor.com/news/boarded-up-...ous-buildings/
Don't forget the Greek Orthodox Church ruins!