via invisible people - mark harvoth - et al.
part 1:
http://affordablehousinginstitute.org/blogs/us/2013/10/new-york-citys-self-reinforcing-homelessness-ecosystem-part-1-73-increase-in-family-homelessness.html
part 2:
http://affordablehousinginstitute.org/blogs/us/2013/10/new-york-citys-self-reinforcing-homelessness-ecosystem-part-2-more-than-1-billion-annually.html