I'm not aware of any specific study, but let me say that I think we've seen a spike in this kind of usage in the last historical while, and each generation is born into a baseline of a norm. If a child born today understands that community, what's happening today is the norm. For a child born 20 years ago, that is the baseline, the norm for that child as it grows up. So to say that from one generation to another the loss of those jobs, which may not have existed in those communities, has resulted in increased drug use.... I don't think there would necessarily be a correlation there. It's the broader disenfranchisement we're seeing—
On February 11th, 2014. See this statement in context.