Caveat has the details on a fairly new academic paper out of Australia on the efficacy of breed specific legislation in Austrailia.
Here's the money quote from the abstract:
The evidence does not sustain the view that this is a uniquely dangerous breed, and breed-specific laws aimed to control it have not been demonstrated by authorities to be justified by its attack record.
The best part is, the whole academic paper is available free (you have to go to her place though for the link).
This joins academic research from Spain, Ohio State University, Sacramento and others that report that BSL is not warranted, and not effective. This represents academic research from 3 contininents that show it not to work.
These studies join every organization of animal welfare experts in the country stating that BSL is not effective. When cities make decisions about dog laws based on facts and research, and not just emotion, they universally decide against breed specific laws.
A couple of years ago, one of our local cities was looking at potential dangerous dog legislation. One Public Safety Advisory Board member refused to meet with any of the constitutents because he wanted to do all of his own research on the subject. When we came back two weeks later, this was his statement:
"After spending the last 2 weeks reading about this topic, you would pretty much have to be illiterate to think breed bans work.".