The importance of social capital for sustainable development is well understood. However, the impact of social capital is not easily quantified and to overcome this, the Social Capital Initiative at the World Bank attempts to contribute to this understanding by concentrating on how to measure social capital and its impact.This book details both the quantitative and qualitative approaches to the analysis of social capital. Also included is the Social Capital Assessment Tool which combines quantitative and qualitative instruments in order to measure social capital at the household, community, and organization levels. This tool can be downloaded from a CD-ROM which is included with this book.