Introduction. Part I: Lessons of Longitudinal Research. Natural Histories of Delinquency; T.E. Moffitt. Part II: Recent Longitudinal Studies around the World. Criminal Careers in London and Stockholm: a Cross-National Comparative Study; D.P. Farrington, P.-O. Wikstroem. A Longitudinal Analysis of Juvenile Arrest Histories of the 1970 Birth Cohort in Japan; Y. Harada. Juvenile Justice and Child Welfare: Longitudinal Research in the State of Michigan; I.M. Schwartz, S.A. Kapp, E.J. Overstreet. Methodological Annotations on Retrospection in Criminological Research; P. Sutterer, T. Karger. Determinants of Patterns of Recidivism: Some Results of Survival Analysis Based on Official Crime Records of the Swiss Canton Jura; S. Karstedt. Measures of Escalation and their Self and Social Control Predictors; M. Le Blanc. Family Socialization and Antisocial Behavior: Searching for Causal Relationships in Longitudinal Research; J. McCord. Longitudinal Research in Criminology: Promise and Practice; D.S. Elliott. Examining Developmental Trajectories in Delinquency Using Accelerated Longitudinal Research Designs; D. Huizinga, F.-A. Esbensen, A. Weiher. Neigborhood Context and Delinquency: a Longitudinal Analysis; A.J. Lizotte, T.P. Thornberry, M.D. Krohn, D. Chard-Wierschem, D. McDowall. Initiation of Drug Selling and its Relationship with Illicit Drug Use and Serious Delinquency in Adolescent Boys; W. van Kammen, E. Maguin, R. Loeber. The Probability and Timing of Rearrests for Seriously Violent Crimes: Some Descriptive Patterns in Individual Arrest Histories and their Policy Implications; N.A. Weiner. Self-Reported and Officially Defined Offenses in the 1958 Philadelphia Birth Cohort; R.M. Figlio. Protective Effects of Social Resources in Adolescents at High Risk for Antisocial Behavior; F. Losel. Desistance from a Delinquent Way of Life? R. Mischkowitz. Part III: Clinical Approaches, Deterrence, and Socio-Economic Development. Longitudinal Research from the Point of View of Clinical Criminology; U. Gatti, A. Verde. Criminological Research: From Cohort Studies to Clinical Epidemiology; A.M. Favard. Identification and Interpersonal Maturity: Contribution to a Developmental Approach of Juvenile Delinquency; E. van Poppel, M. Born. Evidence for the Adoption of a Learning Theory Approach to Criminal Deterrence: a Preliminary Study; P.A. Brennan, S.A. Mednick. Development and Crime: an Explanatory Study in Yugoslavia; U. Zvekic. Part IV: Future Directions of Longitudinal Research. Communities Change, Too; M.W. Klein. Next Steps in Criminal Career Research; A. Blumstein. A Case for a Longitudinal Study; C.-G. Janson. Towards Comparative Societal Longitudinal Studies; A.J. Reiss, Jr. Epilogue: Workshop and Plenary Discussions, and Future Directions; E.G.M. Weitekamp, H.-J. Kerner.