The extraterritorial application of competition law on the basis of the effects doctrine of jurisdiction has long been controversial. An analysis of the assumptions which underlie the discourse of jurisdictional assertion leads, however, to the conclusion that the effects doctrine is the only principle on which competition law jurisdiction can reasonably be based.
Moreover, a form of qualified effects principle, founded upon the consent of the undertakings involved, would be supported by most, if not all, of the leading players in the competition law arena.