The University of Chicago Law School Faculty Blog has a wonderful post by Professor Sunstein on the citation of foreign materials by the US Supreme Court.
Regular readers may realize by now that that subject is a peculiar obsession here. See a previous post about an op-ed by Professor Glendon. A few instances of when the Court of Justice could have cited - but did not cite - US material are mentioned. It just seems curious that the subject should be so passionately debated when it comes to the US Supreme Court whereas the practice of the Court of Justice and of the Court of First Instance of not citing foreign material is not questioned in the EU. Of course, one commentator did point out that the Advocates General do cite foreign material occasionnally.
Perhaps the Court of Justice and the Court of First Instance should study the Condorcet jury theorem to decide whether it is worthwhile citing non-EU judgments in their own judgments (apart from ECHR judgments).