Yes. Our organization has prepared some material for you, which is being translated. We submitted it only earlier this week, so I don't think it has been translated yet.
It does make some references; study after study has indeed shown that mandatory minimums.... A great piece of literature is the November 2010 report authored by the Canadian Centre for Policy Alternatives. I can forward a copy of that report to you as well, if you like.
The Canada Safety Council, the National Criminal Justice section, University of Alberta law professors, directors from the John Howard Society, a 1990 University of New Brunswick paper--they've all found, in study after study, that there is no evidence that mandatory minimums deter conduct. It's the certainty or the likelihood of being apprehended, and the criminalization of the conduct itself, that results in deterrence, not mandatory minimums.
The objection we have is that when you're looking to change a fundamental underpinning of our criminal justice system, the person who's looking to change that should have the evidence that the changes will work. We're all interested in protecting children, and it would be tragic to see resources used in a manner that's not effective.