The NLS are a set of surveys designed to gather information at multiple points in time on the labor market activities and other significant life events of several groups of men and women. For more than four decades, NLS data have served as an important tool for economists, sociologists, and other researchers. Currently, 16 rounds of data are available for public use. The type of information gathered in survey include (1) employment, education, (2) training & achievement scores, (3) household, geography and contextual variables, (4) parents, family process and childhood, (5) dating, marriage and cohabitation; (6) sexual activity, pregnancy and fertility, (7) children, (8) income, assets and program participation, Health: Conditions & Practices, (9) attitudes, expectations, non-cognitive tests, activities, and (10) crime and substance use.