Daniel Halberstam, the Eric Stein Collegiate Professor of Law, teaches and writes on U.S. constitutional law, comparative constitutional law, European Union law, and global governance. An internationally recognized expert on constitutional law and federalism, Prof. Halberstam focuses on comparative public law and legal theory. He is one of the principal architects of the theory of constitutional pluralism. Prof. Halberstam serves as director of the Law School's European Legal Studies Program. He lectures regularly throughout Europe and holds a position as external professor in the European Law Department at the College of Europe, Bruges. Prof. Halberstam was a fellow at the Institute for Advanced Study (Wissenschaftskolleg), Berlin, in 2009-2010, and now serves on the Institute's advisory board. He also serves on several advisory editorial boards, including Cambridge Studies in European Law and Policy (CUP) and the Common Market Law Review. In 2012, Prof. Halberstam delivered the General Course on the European Union, an invited set of lectures that anchor the European University Institute's annual Academy of European Law. In 2013, he was named chair of the advisory board of the Max Planck Institute for Comparative Public and International Law, Heidelberg. In 2014, Prof. Halberstam organized and chaired substantive discussions at a joint meeting in Luxembourg of the Court of Justice of the European Union and the U.S. Supreme Court. He joined the faculty in 1999 from the U.S. Department of Justice, where he served in the Office of Legal Counsel during the Clinton administration. He holds a BA (mathematics and psychology), summa cum laude and Phi Beta Kappa, from Columbia College, and a JD from Yale Law School, where he was a Coker Fellow for Constitutional Law and articles editor of the Yale Law Journal. Prof. Halberstam served as attorney-adviser to Federal Trade Commission Chairman Robert Pitofsky, and clerked for the Hon. Patricia Wald (D.C. Circuit) and for U.S. Supreme Court Justice David H. Souter. Prof. Halberstam was also judicial fellow for Judge Peter Jann at the European Court of Justice.