PDF - http://www.sentencingproject.org/pdfs/incarceration-crime.pdf
"'During the last 30 years of incarceration growth, we have learned a great deal
about the financial and social costs and limited effectiveness of incarceration on crime rates. While incarceration is one factor affecting crime rates, its impact is more modest than many proponents suggest, and is increasingly subject to diminishing returns. Increasing incarceration while ignoring more effective approaches will impose a heavy burden upon courts, corrections and communities, while providing a marginal impact on crime. Policymakers should assess these dynamics and adopt balanced crime control policies that provide appropriate resources and support for programming, treatment, and community support.'"
