: Check out this link."Rose, a sociologist at New York's John Jay College of Criminal Justice, found that in high-crime Tallahassee neighborhoods that were otherwise comparable, crime reductions were lower in those with the greatest number of people moving in and out of prison."
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Maybe it's the large number moving out of prison that's the problem. 
I find the thesis of the article questionable; do they really think that men who commit crimes are good role models? 
None.