Prof. Dr. Marcelo F. Aebi is a full professor of criminology and vice-director of the School of Criminal Sciences at the University of Lausanne, Switzerland. He is author or co-author of more than one hundred scientific publications. After his studies at the Universities of Buenos Aires (Argentina) and Lausanne, he was professor of criminology at the University of Seville (Spain). He is also a consultant expert of the Council of Europe, a member of the European Sourcebook Group, the Executive Secretary of the European Society of Criminology, and part-time visiting professor at the Autonomous University of Barcelona.