NIGEL DA COSTA LEWIS is a Professional Writer who has many years work experience in quantitative, econometric and statistical methods. He has worked in the City of London, on Wall Street and in academia. Dr Lewis is the author of a number of books for risk managers, including Operational Risk with Excel and VBA (Wiley) and the classic text Market Risk Modelling (Risk Books). He also holds an award winning PhD from the University of Cambridge and four Master's degrees in Statistics, Economics, Finance, and Advanced Computer Science, all from the University of London, UK.