Reliable quantitative data are essential for understanding economic, social and governance development because it provides evidence, and evidence are crucial to set policies, monitor progress and evaluate results. Africa Development Indicators 2010 (ADI) provides the most detailed collection of data on Africa available. It puts together data from different sources, and is an essential tool for policy makers, researchers, and other people interested in Africa. The opening articles of the ADI 2010 print edition focus on behaviors that are difficult to observe and quantify, but whose impact on se |