This book provides a comprehensive overview of the many advances that have been made in the field of longitudinal survey methodology over the past twelve years, as well as slightly extending the topic coverage of the earlier volume, Methodology of Longitudinal Surveys. As such, it describes the state of the art in designing, implementing, and analysing longitudinal surveys. The greatly expanded enthusiasm for longitudinal surveys has brought with it a thirst for knowledge about the best ways to design and implement such surveys. Considerable advances in knowledge have been made in recent years in areas that are covered in this book that encompasses all stages of the design and implementation of longitudinal surveys. Chapter 17 discusses methods to impute clustered or panel data.