This book is the result of a three-day conference about "European Economy and People's Mobility" which was held by the Jean Monnet Centre of Excellence Jena in May 2015. Within the internal market which lies at the heart of the European Union's rules, it is the free movement of persons that most drastically affects people's everyday lives in the Member States. In this book, the authors try to answer the questions arising from "People's Mobility" in the European Union from an interdisciplinary perspective. What are the manifestations of mobility? Have they changed in recent years/decades? What is the current grade of mobility? Are individuals more mobile today than in the past? Are there groups that are more mobile than others? What are the (social, economic, political, legal, psychological) preconditions for mobility, and which of these factors advance or impede mobility? Is mobility (socially, economically, politically, psychologically) desirable? What are its positive/negative effects, and how should mobility be increased or reduced?