In the journey leading to this monograph, I was fortunate to have enjoyed the company of my wonderful friends and colleagues. First and foremost, I am thankful for the support of Prof. Christoph Herrmann. He was always there in times of need and encouraged and challenged my ideas. I am thankful to Prof. Pauwelyn for his valuable and extremely detailed comments on earlier drafts of this book. I am grateful to Dr. Karl Brauner and Dr. Christian Melischek without whom my research stay at the WTO would not have been possible and for being great hosts. I thank Dr. Gustav Brink, Maxim Shmelev, Sahar Hosni, Darlan Martí, Alexis Massot, Jean-Daniel Rey, Nathalie Diaz, Carina van Vuuren, and Graham Cook for their valuable comments and helpful discussions. I also thank Dr. Katharina Steinbrück for her valuable input on an earlier draft of this book and her enduring support.