William Perraudin is Director of Risk Control Limited, a specialist risk management consultancy and software firm. He is Adjunct Professor of Imperial College Business School where he was, in the past, Head of the Finance Group and Director of the Risk Management Laboratory. He holds degrees from Oxford, LSE and Harvard. As well as Imperial College, William has taught in the University of Cambridge and in Birkbeck College. He also worked at the International Monetary Fund and as a City stockbroker. He was a Special Advisor to the Bank of England and as such was involved in the calibration of the Basel II capital charges for international banks. William’s research interests are in pricing credit exposures, the analysis of real options, risk management and banking regulation. He has consulted for a wide range of financial firms and public institutions.