The Health and Retirement Study (HRS) is a long-running study that examines middle-aged and older adults in the US, producing data that is used both domestically and internationally. As a panel survey, HRS follows approximately 20,000 U.S. adults, some of whom have participated in the study for 30 years, through the retirement and aging process.

Survey Research Operations (SRO) is the data collection unit within the Survey Research Center and the largest academic based survey research organization in the country. We offer comprehensive survey design, project management, sampling, data collection, and data processing services for researchers both within and beyond the U-M community. SRO collects cross-sectional and longitudinal data from local, regional, and national study populations, and we are devoted to innovative and high quality measurement, data collection, and implementation of survey methodology in the social sciences.