The Understanding America Study HRS baseline surveys are the first HRS surveys that UAS respondents are invited to. This happens as soon as they have become part of the UAS and have filled out at least 3 surveys in addition to the My Household Survey (Note: respondents who joined the UAS early were invited already after completing 1 additional survey). The following HRS surveys are administered:

Note that the above list excludes the HRS 2014 sections H (mortgage crisis), I (physical measures and biomarkers), S (widowhood and divorce) and W (Internet use).