is the author of sections III.2., III.3., IV.1. and IV.2., whereas Eleni Zervogianni is the author of sections II., III.1., and IV.3. Sections I., V. and VI. have been co-authored. Both authors would like to thank all the participants at the Seventh Max Planck PostDoc Conference at the Max Planck Institute for Comparative and International Private Law in Hamburg, April 23-24, 2018, as well as two anonymous reviewers for their helpful comments and feedback. Any remaining errors are of course ours.