Juvenile delinquency in the United States refers to crimes committed by children or young people, particularly those under the age of eighteen (or seventeen in some states). Juvenile delinquency has been the focus of much attention since the 1950s from academics, policymakers and lawmakers. Research is mainly focused on the causes of juvenile delinquency and which strategies have successfully diminished crime rates among the youth. Though the causes are debated and controversial, much of the debate revolves around the punishment and rehabilitation of juveniles in a youth detention center or elsewhere.