Читать книгу Administrative Records for Survey Methodology - Группа авторов - Страница 33

The HRS is conducted by the Institute for Social Research at the University of Michigan. Data collection was launched in 1992 and has reinterviewed the original sample of respondents every two years since then. New cohorts and sample refreshment have made the HRS one of the largest representative longitudinal samples of Americans over 50, with over 26 000 respondents in a given wave (Sonnega and Weir 2014). In 2006, the HRS started collecting measures of physical function, biomarkers, and DNA samples. The collection of these additional sensitive attributes reinforces confidentiality concerns.