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Data Brief Series

National Couples’ Health and Time Study

Kamp Dush, Claire and Manning, Wendy, September 2026

NCHAT is a nationally representative, longitudinal study of married and cohabiting couples ages 20–60 in the United States. Data include a relationship-and-health survey with 24-hour time diaries, momentary well-being reports, and biological data.

 

Health and Relationships Project (HARP)

 Umberson, Umberson, June 2026

The Health and Relationships Project (HARP) is a longitudinal dyadic study of legally married same- and different-sex couples that combines baseline surveys with short 10-day daily diary bursts. Designed to capture relationship processes, health behaviors, and well-being over time, HARP launched in 2014-2015 (T1) and followed couples again in 2021-2022 (T2), and 2024-2025 (T3).

High School & Beyond (HS&B:80)

 Muller, Chandra; Warren, John Robert; Grodsky, Eric; Manly, Jennifer J., August 2026

HS&B:80 is a nationally representative longitudinal cohort linking early-life education experiences to later-life economic, health, cognitive, and biological aging outcomes through repeated surveys, assessments, and biomarkers.