I think it will be effective partially by just having something on the books; I think that's a strong societal message that this is not okay. I think one step is to stigmatize it. Will it go away tomorrow? No, it won't.
Right now, I think we have a mishmash of laws that are quite unhelpful. We do see that the blame needs to be placed on the buyer. For whatever reason, it has been quite invisible, and we just don't really talk about it. I think making more visible the harm that prostitution does is important. But as far as the laws are concerned, there have really been dramatic changes in Sweden around criminalizing the buyers, decriminalizing the women, and having exit programs, and then educating people about what those laws are. Part of the reason is that they were bundled together with the rape laws, and prostitution was identified as an act of violence against women.