Am I the only one who thought, given it's now 2014 and that the law was changed nearly 5 years ago, that we also now have an even more complete set of data with which to support the hypothesis? But they don't seem to go there at all?! The chart appears to show crimes rising again once it was outlawed but for the most part the article is written as though it's 2010.
Don't know why this doc does haven't statewide numbers for 2007 (some locations also have 2006, Providence doesn't).
A really odd thing is that PROSTITUTION: ENGAGING seems to have been at by far its highest in 2008. I can't think of a good explanation. Maybe police were pissed off about indoor prostitution being legal, so they cracked down extra hard on outdoor prostitution, but since indoor was re-illegalized, they don't care?