Workshop participants, representing 15 countries and 30 universities and research centers, defined self-reported crime as admitted crime by adults and juveniles. International research studies and comparisons were presented on juvenile delinquency, adult crime, drug abuse and delinquency, and property crime. Technical issues in self-report research were addressed, such as self-reported measures of delinquency, prevalence and incidence in the study of antisocial behavior, the development of a new measure of self-reported antisocial behavior for young children, the role and relevance of national penal codes and criminal justice systems in comparative research on crime and delinquency, and what kind of homogeneity is needed for self-report delinquency items. Workshop participants considered self-report research in the longitudinal context, focusing on methodological issues in self-reported crime and delinquency, the relation between education and delinquency, problems associated with the use of self-reports in longitudinal research, and the design of a self-report instrument for studying offense patterns from childhood to adulthood. References, tables, figures.