There was a study done on version 1.0 of these zones. It found them to be racially discriminatory in application. This was part of why they were allowed to expire. Here is the study:
http://blogtown.portlandmercury.com/files/2007/09/CDRI_DFZ%20Report%20Sept%202007.pdf
POSTED BY DENIS C. THERIAULT ON MON, SEP 26, 2011 AT 10:59 AM
http://blogtown.portlandmercury.com/files/2007/09/CDRI_DFZ%20Report%20Sept%202007.pdf