Ernesto Duhne is singled out by clients for his "ability to handle merger cases in situations with many nuances." They go on to say: "His writing and oral communication are both very effective." Sources also point to the fact that "he sticks with the case from start to finish and is a strategically minded lawyer." He handles complex merger clearance cases, as well as anti-competitive behaviour investigations. - CHAMBERS AND PARTNERS.Ernesto Duhne leads an active practice at Santamarina y Steta, where he is backed up by Jorge Barrero and Vicente Grau on the corporate side, and Mariano Calderón on contentious matters. The firm is highly experienced in merger clearance, recently handling the Mexican aspects of Marriott International’s takeover of Starwood International Hotels & Resorts, and Schlumberger’s acquisition of Cameron International. The team is also involved in some highly sensitive disputes with the regulators, involving claims of anti-competitive behaviour. It is well-versed in cartel investigations, and provides dawn raid training to clients. - THE LEGAL 500Ernesto Duhne specialises in competition and antitrust, foreign trade, corporate, mergers and acquisitions and franchising and licencing. He has vast experience in merger reviews, transactional antitrust, counselling and representing a variety of clients in antitrust investigations comprising both absolute or per se monopolistic practices as well as investigations on relative monopolistic practices (“rule of reason”), coordinating with foreign counsel in multiple jurisdictions.He has guided numerous mergers and acquisitions in a broad range of industries and has been very active in developing and updating compliance programmes and materials, as well as in conducting on-site antitrust training for clients. He also practises customs and international trade law, representing clients in different transactions and administrative procedures.