PROJECT SUMMARY/ABSTRACT Following decades of discriminatory policies and underinvestment in affordable housing, the 1.2 million households residing in our nation’s public housing (PH) developments often live in conditions of concentrated poverty, unhealthy and unstable housing and community contexts, and constrained social and economic opportunity. These social determinants of health drive substantial health disparities, with PH residents experiencing elevated levels of mortality and morbidity across numerous health domains. In response, current policy efforts seek to redevelop PH into mixed-income communities in order to deconcentrate poverty, create healthier housing environments, decrease community stressors, and enhance community resources. It is essential to delineate the repercussions of such policies on health disparities and to understand the mechanisms underlying effects. This project seeks to exploit a multi-arm natural experiment of PH redevelopment to evaluate whether improving housing quality, limiting external displacement, and creating mixed-income communities improve the physical, mental, and behavioral health of PH residents, including children, adults, and older adults. We will further assess the social, environmental, and physiological mechanisms underlying such effects. Finally, we will address whether effects vary across resident age, gender, and race/ethnicity. The study will employ a rigorous mixed-methods design to follow 1068 individuals from 600 households in a Boston PH community undergoing redevelopment. The redevelopment plan will move quasi-randomly selected subsets of residents into new high quality PH, or displace them offsite followed by a return into new high quality mixed-income housing. We will compare these residents to a matched control group who will remain in place. Our interdisciplinary team will collect four waves of in-person surveys, direct environmental assessments, and direct physiological stress measurements, as well as annual geocoded administrative data and intensive qualitative interviews with a subset of respondents. This innovative combination of sources will provide data on resident physical, mental and behavioral health; physiological stress; social connections and collective efficacy; housing quality and disorder; and neighborhood crime, pollution, social problems and resources. Intent-to-treat, difference-in-differences, and average treatment effect models will provide rigorous evidence of how housing quality, residential displacement, and residence in mixed-income housing affect resident health. Structural equation models and qualitative analyses will identify mechanisms underlying housing effects. Our results, unearthing causal and dynamic processes underlying health disparities, will provide innovative new data on social determinants of health to inform models of housing and community redevelopment in the context of concentrated poverty.

PROJECT NARRATIVE Residents in our nation’s public housing developments live in conditions of concentrated poverty, unhealthy and unstable housing and community contexts, and weak social and economic opportunities, all key social determinants of poor health. This mixed-methods study exploits a multi-arm natural experiment of public housing redevelopment to evaluate whether improving housing quality, limiting external displacement and creating mixed-income communities improve the physical, mental, and behavioral health of public housing residents. Results will provide key insights into burgeoning economic health disparities, and inform policies and practices targeting our most disadvantaged neighborhoods.