This book is the outcome of a joint research project carried on by the University of Milan and the Scuola superiore Sant\u2019Anna in Pisa, financed by the Italian Ministry of University and Research and directed by Gabriella Venturini. The study was carried on between 2006 and 2008 by two groups of scholars in Milan and in Pisa (under the responsibility of Gabriella Venturini and Andrea de Guttry, respectively) in close cooperation with Harry Post. On 19-20 October, 2007, an international Conference was organized at the premises of the Scuola Superiore Sant\u2019Anna, in Pisa, aimed at discussing the main aspects of the study with an outstanding group of Italian and foreign scholars and experts. This book is the result and the fruit of the...