The number of people incarcerated in the United States has increased significantly over the past three decades from approximately 419,000 inmates in 1983 to approximately 1.5 million inmates in 2013. Concerns about both the economic and social consequences of the country’s growing reliance on incarceration have led to calls for reforms to the nation’s criminal justice system. There have been legislative proposals to implement a risk and needs assessment system in federal prisons. The system would be used to place inmates in rehabilitative programs. Under the proposed system some inmates would be eligible to earn additional time credits for participating in rehabilitative programs that reduce their risk of recidivism. Such credits would allow inmates to be placed on prerelease custody earlier. The proposed system would exclude inmates convicted of certain offenses from being eligible to earn additional time credits.