Ashley Gromis

Ashley Gromis
Associate Behavioral/Social Scientist


Ph.D. in sociology, University of California-Los Angeles (UCLA); M.S. in health policy and management, University of California-Los Angeles (UCLA); M.A. in sociology, University of California-Los Angeles (UCLA); B.A. in sociology, Pennsylvania State University-Main Campus


Ashley Gromis (she/her) is an associate behavioral/social scientist at RAND. Her work examines the roles of networks, place, and policy in shaping community- and population-level health outcomes and social inequality. Her primary research uses systems science methods (e.g., agent-based modeling, simulations) to understand how spatial clustering of children not up-to-date with vaccinations affects the potential for disease outbreaks. She is particularly interested in how social networks and local communities influence perceived infection risk and vaccination decisions for influenza, COVID-19, HPV, and routine childhood immunizations. More broadly, Gromis has applied her methodological skills to examine prevalence and socio-demographic disparities in housing eviction lawsuits and spatial clusters of public reports of Unidentified Areal Phenomena (UAPs, formerly known as UFOs). She holds a Ph.D. in Sociology (University of California, Los Angeles), an MS in Health Policy and Management (University of California, Los Angeles), and BAs in Sociology and History (Pennsylvania State University).

Selected Publications

Posard, Marek N., Ashley Gromis, and Mary Lee, Not the X-Files: Mapping Public Reports of Unidentified Aerial Phenomena Across America, RAND Corporation (RR-A2475-1), 2023

Ashley Gromis & Ka-Yuet Liu, "Spatial Clustering of Vaccine Exemptions on the Risk of a Measles Outbreak," Pediatrics, 149(1), 2022

Ashley Gromis, Ian Fellows, James R. Hendrickson, Lavar Edmonds, Lillian Leung, Adam Porton, & Matthew Desmond, "Estimating Eviction Prevalence across the United States, 2000-2018," Proceedings of the National Academy of Sciences , 119(21), 2022

Ashley Gromis*, James R. Hendrickson, & Matthew Desmond (*joint first author), "Eviction from Public Housing in the United States," Cities: An International Journal, 127(1), 2022

Ashley Gromis and Ka-Yuet Liu, "The Emergence of Spatial Clustering in Medical Vaccine Exemptions Following California Senate Bill 277, 2015–2018," American Journal of Public Health, 110(7), 2020