Ah, another article that keeps it's evidence behind links to paywalls, what joy.

How does the author know immigrants commit fewer crimes? Well you can find out by paying £28 for a day's access. Want to know why we're saying cities with high immigrant population haver lower crime rates? $35.95 please. Want to know the numbers of our own study? Pay up.

As an aside, it's sad the Scientific American has been driven to outsourcing thier articles from theconversation.com.

Times must be tough indeed.