, for her valuable guidance and support in writing this dissertation. To my family, and in particular to Paolo, for his support in helping make my dream come true. To my daughters, who did not fail to inspire me every single day of our life together, giving me a reason to become a better me and pursue my doctoral studies. To Claudia Lucia Mejia de la Pava, for her continuous support, for the participation to our "consejos de guerra" and for making this doctoral studies a beautiful journey into Friendship. A special thanks to my friends and colleagues who work for the European Institutions all over Europe (and beyond!), and in particular to those who participated to the EU HRM Legal Framework questionnaire: without their valuable inputs, this research would not be meaningful. And finally, a special thank, which will hopefully break the wall of time and space, to Professor Angelina Desiderio: if it were not for her and the love for culture and research as she taught me, I would not be who I am today. And as the adage goes, all the errors, omissions, mistakes, limitations that may arise from this dissertation are mine and only mine.