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.

  • Build a long-term cohort of individuals experiencing unsheltered homelessness in Los Angeles County

  • Leverage mobile phone technology, a web-based survey platform, and electronic gift card incentives for seamless participation

  • Collect ongoing data on health, housing, service access, and social outcomes to monitor impacts over time

Data Visualisation

New Insights: Leveraging PATHS to Understand the Impact of the January 2025 Los Angeles Firestorm on People Experiencing Homelessness