Negative Economic Impacts of Legalization

Quick question for anyone who might know...I'm trying to locate some information/research in relation to the potential negative economic impacts of full force drug legalization. The is all theoretical of course, but I'm sure that someone, somewhere has looked into the short-term impact legalization would have on inner-cities. FWIW -- I'm thinking about the impact that legalization would have on the displaced workers that are currently running and administrating the illicit drug market. Of course legalization of this sort would most likely never happen, let alone in such a revolutionary style, but I'm curious nonetheless if anyone has done work on what the transition period would/should look like IN the drug markets themselves. I'm mostly concerned with the street level organizations that do the distribution of the product....Any links would be appreciated.