Disaggregated data collection and analysis is recommended for policy development to address race inequality. Moreover it provides a useful tool to address Afro-phobia and other forms of xenophobia.
I think this might interest you: Ikram, U. Z., Snijder, M. B., Wit, M. A., Schene, A. H., Stronks, K., & Kunst, A. E. (2016). Perceived ethnic discrimination and depressive symptoms: the buffering effects of ethnic identity, religion and ethnic social network. Social psychiatry and psychiatric epidemiology, 51(5), 679-88.