I would recommend that you all take a look at the technical paper that the minister just tabled. All of the research is referenced in that paper in the end notes, as well as in annex B, which is a bibliography. There is evidence that speaks to the experience of New Zealand, which decriminalized prostitution. I believe they put restrictions on advertising, but in a regulatory context as opposed to a criminal context.
On July 7th, 2014. See this statement in context.