2010 study in the Proceedings of the National Academy of Sciences on the relationship between childhood self-control and its consequences later in life.
2012 Yale University and Washington University of St. Louis study on the cost-effectiveness of three types of peer-intervention methods.
2007 paper in the Journal of Experimental Criminology on the effectiveness of incarceration-based drug treatment in reducing drug relapse and recidivism.
2009 National Bureau of Economic Research paper on the relationship between early exposure to violence and later problems such as substance abuse and delinquency.
2008 review by the Harvard Family Research Project of available research on the relative benefits and required factors for success of after-school programs.