This book provides a comparative legal study of the concept and content of joint parental authority after divorce and the breakup of a relationship in Dutch and Danish law. In addition, the Principles Regarding Parental Responsibilities which have been drafted by the Commission on European Family Law (CEFL) are taken into account. The knowledge provided by this study serves various purposes. First, it contributes to the ongoing debate concerning the convergence of family law in Europe and the related discussions concerning the desirability and feasibility of its harmonization. It also provides inspiration for national debates concerning the construction and content of joint parental authority and contact. Finally, Joint Parental Authority offers a micro-comparative study of the family law systems of Denmark and The Netherlands, which to date has never been the subject of a direct comparison.