International migration has profound implications for human welfare, and African governments have had only a limited influence on welfare outcomes, for good or ill. Improved efforts to manage migration will require information on the nature and impact of migratory patterns. This book seeks to contribute toward this goal, by reviewing previous research and providing new analyses (including surveys and case studies) as well as by formulating policy recommendations that can improve the migration experience for migrants, origin countries, and destination countries. The book comprises this introduction and summary and four chapters. Chapter one reviews the data on African migration and considers the challenges African governments face in managing migration. Chapter two discusses the importance of remittances, the most tangible link between migration and development; it also identifies policies that can facilitate remittance flows to Africa and increase their development impact. Chapter three analyzes high-skilled emigration and analyzes policies that can limit adverse implications and maximize positive implications for development. Chapter four considers ways in which Africa can leverage its diaspora resources to increase trade, investment, and access to technology.