Hybrid Constitutional Courts: Foreign Judges on National Constitutional Courts

ROSALIND DIXON* & VICKI JACKSON**

Foreign judges play an important role in deciding constitutional cases in the appellate courts of a range of countries. Comparative constitutional scholars, however, have to date paid limited attention to the phenomenon of “hybrid” constitutional courts staffed by a mix of local and foreign judges. This Article addresses this gap in comparative constitutional scholarship by providing a general framework for understanding the potential advantages and disadvantages of hybrid models of constitutional justice, as well as the factors likely to inform the trade-off between these competing factors. Building on prior work by the authors on “outsider” models of constitutional interpretation, it suggests that the hybrid constitutional mod- el’s attractiveness may depend on answers to the following questions: Why are foreign judges appoint- ed to constitutional courts—for what historical and functional reasons? What degree of local democratic support exists for their appointment? Who are the foreign judges, where are they from, what are their backgrounds, and what personal characteristics of wisdom and prudence do they possess? By what means are they appointed and paid, and how are their terms in office structured? How do the foreign judges approach their adjudicatory role? When do foreign judges exercise their role? Exploration of these questions is informed by interviews of judges who have served on three jurisdictions’ appellate courts that include foreign judges. Ultimately, the Article suggests that the value of having foreign judges on a national court may well depend on their partial “domestication”—through some meaningful degree of domestic support for the role of such judges and through the foreign judges’ own approach to constitutional appellate decision-making, such that they occupy a truly hybrid position between that of constitutional “outsider” and “insider.”

* Professor of Law, UNSW Sydney.

** Thurgood Marshall Professor of Constitutional Law, Harvard Law School. The authors thank Anna Dziedzic, Mark Graber, Bert Huang, David Feldman, Heinz Klug, Andrew Li, Joseph Marko, Sir Anthony Mason, Will Partlett, Iddo Porat, Theunis Roux, Amelia Simpson, Scott Stephenson, Adrienne Stone, Mark Tushnet, and Simon Young for extremely helpful comments on prior versions of the paper, and Libby Bova, Alisha Jarwala, Amelia Loughland, Brigid McManus, Lachlan Peake, Andrew Roberts, and Melissa Vogt for outstanding research assistance.