This book is a complete resource for learning to model data in which observations are grouped---whether nested data such as children nested in schools or repeated observations on the same individuals. Rabe-Hesketh and Skrondal introduce a variety of multilevel models for continuous, binary, count, and other outcomes. They also explain when each model is useful, how to fit and evaluate the model using Stata, and how to interpret the results. With this comprehensive coverage, researchers who need to apply multilevel models will find this book to be the perfect companion. It is also an excellent text for courses in multilevel modeling because it provides examples from a variety of disciplines as well as end-of-chapter exercises that allow students to ractice newly learned material.