European integration not only has changed career opportunities for politicians, it has expanded them. This book is dedicated to the study of political career patterns. It focuses on parliamentary careers in select European countries, but the U.S. is also included as a long-standing system with multi-level politics. The chapters, from an impressive range of scholars, represent a systematic investigation into level-hopping practices in Europe. While discussing the logic of moves across political levels, special attention is given to the impact of institutional reforms. The results indicate that the traditional model of career mobility, with the national level as the apex of a career, is still of importance in most countries – however, a clear trend towards multi-directional political careers is found.