The UNODC 2011 Global Study on Homicide brings together global, regional, national and subnational homicide data in one publication. It is hoped that the data and analysis of the most violent crime against the person will assist global efforts to design evidence-based policies to prevent and reduce crime in those areas and population groups where violence is most acute. This study was made possible because of increased efforts by countries to produce and share good quality homicide data. However, homicide data remain far from perfect.