This book is meant to provide an introduction to the major concepts and principles of pharmacoeconomics, with particular emphasis on modeling, methodologies, and data sources and application to real world dilemmas. Readers will learn about the international use of pharmacoeconomics in drug regulation, drug approval, and pricing. They are also give examples of pharmacoeconomic models used to support these purposes in government, the pharmaceutical industry, and healthcare settings (e.g., pharmacoeconomic analyses of a public health vaccination program).