Bottom line: "From this vast body of work, the RAND authors found only 123 studies, or 0.4 percent, that tested the effects rigorously. Some of the other 27,777 studies may have been useful for non-empirical discussions, but many others were deeply flawed."
The Reason.com authors are not saying that it would be impossible that a study could scientifically conclude that gun control leads to positive results. But they do say that "... short of legitimate scientific evidence, belief in the efficacy of additional gun control laws is, and will remain, a matter of faith, not reason."
"We should not look to pass laws that sweep up innocent victims while potentially doing more harm than good, all with the alleged backing of science that can't possibly tell us what we need to know."
Yeah, I'm sure Democrats will really listen to that advice.
Oh, there's a video on the Reason.com article too (about a 16 minute trip). The video is kind of refreshing because statistician Aaron Brown seems like a really clear-speaking and interesting guy.