Data Watch: The National Longitudinal Surveys
介绍美国全国纵向调查（NLS）的设计和主题覆盖，该调查始于1960年代中期，用于研究不同人群的就业问题，现已扩展至青年群体，涵盖就业、教育、家庭、财务和健康等领域。
This article describes the design features and topical coverage of the National Longitudinal Surveys (NLS). The NLS are perhaps the oldest and most widely used panel surveys of individuals in the United States. These surveys were started in the mid-1960s to exam employment issues faced by different cohorts of the U.S. population. Since then, the NLS surveys have expanded to include two new cohorts of youth. Survey topic areas include employment, education, training, family relationships, financial well-being, and health. Information on data access is also provided.