Periodic Assessment of Trajectories of Housing, Homelessness, and Health Study
An ongoing longitudinal study of people experiencing homelessness in Los Angeles County
Bridging critical gaps in homelessness research through improved longitudinal tracking and a flexible platform for real-time evaluation of emerging policies and issues.
Our approach.
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Build a long-term cohort of individuals experiencing unsheltered homelessness in Los Angeles County
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Leverage mobile phone technology, a web-based survey platform, and electronic gift card incentives for seamless participation
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Collect ongoing data on health, housing, service access, and social outcomes to monitor impacts over time
Data Visualisation
Data Visualisation
Ongoing metrics
Last updated: June, 2025