New York Post, November 5, 2011 by Franklin E. Zimring
http://www.nypost.com/p/news/opinion/opedcolumnists/big_bite_out_of_crime_OqiIVfwn0Fp2S3NVkUNWiK
The impulses that produce muggings are situational and contingent and that means the short-term interventions can have long-term consequences for crime rates.