 Socio-economic status is strongly associated with quality of life, as those of higher socio-economic status report better quality of life than those of lower socio-economic status. Social capital may act as a mediator in this relationship, meaning that it plays a role in explaining why socio-economic status affects quality of life. This study suggests that investment in social infrastructure, such as community centers and other forms of social support, could help reduce inequality and improve quality of life. This article was authored by Jonathan Assai Nuttaker, Lulin Zhou, Ebenezer Larnio, and others.