This conference paper, presented at the International Workshop: Decriminalizing Prostitution and Beyond: Practical Experiences and Challenges, The Hague, March 2011 analyses the evidence for the claims of success for 'the Swedish Model'.
In conclusion the authors state:
"We believe that one has to look at several factors to understand the discrepancy between the stated success of the Sex Purchase Act and its documented effects. While there are some police, social workers and former sex workers who claim that the ban has indeed helped reduce prostitution and trafficking and deterred clients without any adverse effects, the reports and documents that have a scientific rather than ideological base do not support these success claims."
You can download this 36 page PDF resource above. This resource is in English.