1 Introduction -- 2 Overview of Theories and Hypotheses -- Design and Sampling Issues -- 3 Accelerated Longitudinal Design -- 4 Longitudinal-Experimental Combinations -- 5 Community Sampling -- 6 Household and Individual Sampling -- 7 Sampling Yield -- 8 Site Selection -- Measurement and Analysis -- 9 Common Variables -- 10 Measurement Issues -- 11 Statistical Methods and Analysis -- Cohort Studies -- 12 Prenatal and Preschool Cohorts -- 13 Young Adolescent Cohorts -- 14 Young Adult Cohorts -- 15 Sibling Study -- Appendix I Preparatory Field Work and Supplemental Studies -- Appendix II Issues in the Use of Biomedical Measures -- Appendix III Program on Human Development and Criminal Behavior-Participants -- References.