Cities in developing countries are experiencing unprecedented population growth, which is exacerbating their already substantial problems in providing shelter and basic services. This volume draws on the significant advances in technologies and management strategies made in recent decades to suggest ways to improve urban life and services, especially for the poor. Four challenges to developing countries' megacities are addressed: labor markets, housing, water and sanitation, and transportation, along with a synthesis of general thinking on how to meet megacity challenges and be competitive in the twenty-first century.