Personality Development Collaborative

The WLS is a long-term study of a random sample of 10,317 men and women who graduated from Wisconsin high schools in 1957 and of their randomly selected brothers and sisters. Survey data were collected from the original respondents or their parents in 1957, 1964, 1975, 1992, 2003, and 2011 and from a selected sibling in 1977, 1993, 2004, and 2011. Survey data was collected from the spouses of the graduates in 2004 and the spouses of the siblings in 2005. These data provide a full record of social background, youthful aspirations, schooling, military service, family formation, labor market experiences, and social participation of the original respondents. The survey data from earlier years have been supplemented by mental ability tests (of primary respondents and 2000 of their siblings), measures of school performance, and characteristics of communities of residence, schools and colleges, employers, and industries. The WLS records for primary respondents are also linked to those of three same-sex high school friends within the study population. In 1977 the study design was expanded with the collection of parallel interview data for a highly stratified sub-sample of 2000 siblings of the primary respondents. In the 1992-93 round of the WLS the sample was expanded to include a randomly selected sibling of every respondent with at least one brother or sister, and the content was extended to obtain detailed occupational histories and job characteristics; incomes, assets, and inter-household transfers; social and economic characteristics of parents, siblings, and children and descriptions of the respondents relationships with them; and extensive information about mental and physical health and well-being.

The WLS cohort of men and women, born primarily in 1939, precedes by about a decade the bulk of the baby boom generation, which continues to tax social institutions and resources at each stage of life. For this reason, the WLS can provide early indications of trends and problems that will become important as this larger group passes through its 60s. This is in addition to the value of the WLS in obtaining basic information about the life course as such, independent of the cohort’s vanguard position with respect to the baby boom. Also, the WLS is the first of the large longitudinal studies of American adolescents, and thus it provides the first large-scale opportunity to study the life course from late adolescence through the early/mid-60s, in the context of a complete record of ability, aspiration, and achievement.

Principal Investigator(s): Dr. Pamela Herd