The selected papers in this volume, written over a period of some 20 years, represent just a small part of Marco Biagi's scientific writings, and are reprinted here with a view to showing the range, depth and originality of his research work. While many of his papers dealing with labour relations issues in the Italian context were published in Italian, Marco's long association with Johns Hopkins University and Dickinson College, along with his close links with the leading scholars in comparative labour law and industrial relations not just in the member states of the European Union, but also in many other countries, including Japan, were of funamental importance for his work, and as a result he chose to publish many of his most thought-provoking papers in English.