The transition to adulthood in the United States has changed in recent decades as many of the traditional milestones that mark adulthood, such as household establishment and marriage, have changed or been delayed. Among these changes are increased participation and attainment in education; extenuation of educational completion and subsequent delayed participation in the labour force; and delays in child rearing. This book examines numerous aspects of the lives of youth and young adults, ages 14 to 24 in the United States over the last several decades. Discussed are the status and trend data from multiple surveys on the distribution of youth and their family structure; on school, employment, health-related factors and future plans.