Since 1986, Full Professor at School of Engineering, Pontificia Universidad Catolica de Chile. In 2012 received the Life Achievement Award by the International Association for Travel Behaviour Research; in 2010 was elected first PUC Engineering Prize for his outstanding academic trajectory and also received the Humboldt Research Award from the Alexander von Humboldt Foundation in Germany. He has pioneered the development of discrete choice modelling techniques and, more recently, their application to determine willingness-to-pay for reducing externalities (accidents, noise and pollution). With his team, he has developed methodologies used in Australia, Colombia, Norway and Spain. In 2007 he joined the Millennium Institute in Complex Engineering Systems; in 2009 was invited to participate in the TEMPO Project with a five-year funding by the Norwegian government. In 2010 he integrated the Chilean team leading the Centre of Excellence BRT Across Latitudes and Cultures (financed by the Volvo Research and Educational Foundations), with the participation of MIT, Sydney University, Lisbon University of Technology and EMBARQ.
He has published over 100 papers in archival journals. He is co-author of Modelling Transport, a book published by Wiley reflecting the state-of-practice in this discipline, which has sold more than 13,000 copies and is now in its fourth edition; the book is used as base text in most graduate programs in transport, has been translated to Italian (2004) and Spanish (2008) He has also edited another three international books and is the author of two books in Spanish dealing with travel demand models and econometrics of discrete choice. He is also co-author of Micro-GUTS, a simulation game to train transport planners, used by more than 50 academic institutions worldwide. Finally, he is Co Editor in Chief of Transportation Research A, area editor of Transport Reviews, and member of the editorial board of Transportation Research B, Transport Policy, International Planning Studies, Transportation Letters, Journal of Choice Modelling and Research in Transport Economics.
He has managed or advised several large urban transport studies in Latin America and Europe, involving the application of aggregate and disaggregate travel demand modelling techniques, and the use of revealed and stated preference data. In particular, he directed the design and implementation work for the largest metropolitan origin-destination surveys in Chile, such as those for Santiago in 1991 (33,000 households), the Santiago on-going survey that started in 2001-2002 with 15,000 households and interviewed another 5,000 households per year between 2004 and 2007, and more recently the Bogotá 2011 O-D survey involving more than 15,000 households interviewed.