The New York Times, August 1, 2009 by Shaila Dewan
http://www.nytimes.com/2009/08/02/weekinreview/02dewan.html?_r=1
The decline, Mr. Zimring said, has shown that it isn’t necessary to accomplish major feats, like improving education or raising wages, or punitive ones, like increasing prison sentences, to bring crime down. Smart policing can have an effect. “Crime isn’t an essential part of cities as we know them,” Mr. Zimring said.