Friday, January 11, 2013

Are Big Cities More Dangerous Than Small Ones?

| Fri Jan. 11, 2013 3:01 AM PST
 
Are big cities more dangerous than small ones? Of course they are. This is so obvious that it's not even a question most people would think of asking.

And yet, if you'll bear with me for a bit, it turns out there's more of a mystery here than you might think. In 1996, for example, Ed Glaeser and Bruce Sacerdote wrote a paper trying to figure out why there's more crime in big cities. They came up with a couple of reasons. First, there's more valuable stuff to steal in big cities, so robbery is more profitable. Second, it's easier to be anonymous. If you mug someone in Mayberry, there's a good chance your victim will recognize you and report the crime. Beyond that they threw up their hands, suggesting that perhaps the rest of the difference might be due to the fact that families are less intact in big cities. But even after running batteries of statistical tests, they were still left scratching their heads. Sure, there are more broken families in big cities, but that "still leaves unanswered the question of why this variable is so important in leading to criminal behavior." What's more, "the results on higher benefit levels and lower arrest rates are intriguing but also not entirely satisfying."

Well, if that's not satisfying—and it isn't—how about an answer out of left field? Maybe the real answer is that big cities aren't much more dangerous than small ones. Let me explain.
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