The study includes 15,117 males and females. Basic data about crime in the cohort are presented along with more detailed data about the age-crime relationship. Special emphasis is given to sex and social class differences. The findings are discussed in the context of the recent debate on the value of longitudinal studies of crime as regards the study of the age-crime relationship. The results show that overall there are many general similarities with the findings from U.S. and British research on age, crime, and criminal careers. 13 tables, appendix, and 27 references. See NCJ 124605-124612 for individual papers. (Author abstract)