As a sociologist, she studies how the health effects of structural inequality can be modified through policy. Dr. Riley has ... Article: Association Between Income Inequality and County-Level COVID-19 Cases and Deaths in the US.. ... Her research examines the impacts of social policies, including alcohol and drug control policies on violence, substance use, ... MacDonald SC, Hernán MA, McElrath TF, Hernández-Díaz S. Assessment of recording bias in pregnancy studies using health care ...