Household surveys in sub-Saharan Africa collect important location-based information on age, income and health of Africans that support health and development efforts. Scientists and practitioners alike often assume this data is equally good everywhere, but no one has closely looked at how data quality might vary across different parts of a country. In this study, we examined the quality of recent household survey data in 35 African countries, looking at village areas (5×5 km) and districts.
