I am now back in Europe after several weeks spent teaching antitrust law at Harvard with my friend and co-author Einer Elhauge. Our course was quite innovative as every antitrust topic we decided to deal with was examined under both US antitrust law and EC competition law. The teaching materials comprised an equal amount of US and EC materials with some comparative notes and discussions. Besides marked differences in the way some issues are apprehended (especially with respect to abuse of dominance and analysis of conglomerate mergers although the tide may be changing in Europe), both regimes are increasingly speaking the common language of economics. Convergence will thus not occur as a result of a conscious decision of antitrust authorities to follow similar lines of analysis (let’s not forget that antitrust on both sides on the Atlantic is to a large extent court-based and courts are not pursuing convergence as an objective), but rather because antitrust law and economics are increasingly relying on the principles taught by microeconomics. Our teaching materials will be published in a casebook entitled “Global Antitrust Law” to be published by Foundation Press (US law school version) and Hart Publishing (global version) later this year.