interesting. Your open view toward new ideas is encouraging and your ability to ask precisely the right questions continues to amaze me. I also want to thank Paolo, for being invaluable in carrying out the research of the past years. Your precise comments and ideas as well as your coding wizardry have enabled us to perform better research. I want to thank Darryl as well, for being so enthusiastic about our work and always being open for discussion. A special thanks to my colleagues Arnout and Erwin are also in place. You have turned out to be good travel partners and fellow coffee drinkers, and luckily we share a passion for silly jokes.I am grateful to the members of the graduation committee, Hans Zwart, Bojana Rosic, Colin Cotter, Roel Verstappen, Paolo Cifani, and Bernard Geurts, for investing time and effort to critically read and review this thesis.Finally, I want to thank my family and my girlfriend for their unconditional support. Thanks for letting me vent about anything and always providing help when I needed it.