Their landmark studies of inmates at the Massachusetts Reformatory examined the efficacy of the penal system and recidivism rates. In their controversial 1950 work Unraveling Juvenile Delinquency the two claimed that potential deviants could be identified by as young as six years of age. They would collaborate on more than 250 publications, beginning with Five Hundred Criminal Careers (1930), followed by Five Hundred Delinquent Women (1934) and One Thousand Juvenile Delinquents (1934).
Their influential research at the Massachusetts Reformatory explored the penal system's efficacy and recidivism rates. In their 1950 work Unraveling Juvenile Delinquency, they suggested that potential deviants could be identified as young as six years old. They would collaborate on numerous publications, starting with Five Hundred Criminal Careers (1930), followed by Five Hundred Delinquent Women (1934) and One Thousand Juvenile Delinquents (1934).