This volume describes the findings of a longitudinal, birth cohort study of juvenile delinquency in Puerto Rico. Carried out under the auspices of the Puerto Rican Senate's Special Crime Commission, the book represents a new type of birth cohort study, based on the classic work done in Philadelphia. The authors have traced Puerto Rican children born in 1970, both male and female, through the greater San Juan police departments, charting the incidence of delinquency and the number of recurring offenders. These findings are compared to the Philadelphia studies of 1945 and 1958. The book begins...