Aaron's research interests are in three main areas: 1) the political economy of health, 2) the political and cultural consequences of the mass media, and 3) the cultural politics of class.
His research on the political economy of health has used natural experiments to understand whether poverty reduction policies affect health and alter health inequalities. Relatedly, he has published on the influence of the Great Recession and austerity policies on health in Europe and North America. His work on the media has begun tracing the economic, social, and political factors shaping attitudes toward the welfare state and people on welfare in the UK, with a specific focus on how the media shapes these narratives. Finally, he has used interview data, small-scale experiments, and large-scale surveys, to explore the cultural politics of class, examining how social inequalities are linked with economic inequalities.