People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal. 'Writing the truth being so difficult, I have in the interests of it allowed myself to go sometimes slightly beyond and slightly this side of it. All events and persons in this book are accidental and have something to do with the truth.'-Robert Capa, Slightly Out of Focus Robert Capa wrote this disclaimer on the front jacket flap of the original edition of his memoirs of the Second World War as photojournalist. His words are a legacy of his sense of humour and humility. Putting into perspective his own courage, he did not claim reporting the truth about the front: he told the war through his lens. Some more than 60 years later, and albeit in a very different context, his words convey well my feelings about completing this doctoral thesis. I initially thought pursuing doctoral studies would lead me to the truth. I have now come to realise that reaching-attempting to reachthe truth is a long journey that requires self-deprecation. First, I would like to acknowledge the financial support of the Europen Union under the Marie Curie Initial Training Network (ITN) 'Transnational Migration, Citizenship and the Circulation of Rights and Responsibilities' (TRANSMIC) (FP7-PEOPLE-2013-ITN, Grant Agreement No. 608417) in allowing me to conduct this research in ideal conditions. This process has been shaped by multiple encouters. I would like to thank my supervisors, Wim Naudé and Melissa Siegel. Wim, I would like to thank you for your open-mindedness, your support and trusting my abilities. Each one of our meetings helped me stand back and move forwards at the same time. Melissa, I would like to thank you for your flexibility, your easy reach and your (communicable) willpower. You do make things happen! I would like to thank the members of the assessment committee: Andries de Grip, Arnaud Dupuy, Didier Fouarge, Tobias Stöhr and Carlos Silva-Vargas. You pointed out inconsistencies in the first version of this manuscript, and helped me reflect on my work. Your comments substantially improved it.