Ian's research interests lie in statistics in sport and the analysis of gambling markets and issues relating to gambling. Ian was founding Chair of the Royal Statistical Society's Statistics in Sport Section, and serves as Associate Editor of the International Journal of Forecasting and the Journal of Quantitative Analysis in Sport. Ian has published research on a wide variety of topics including: ranking methods in sport; forecasting results in football, tennis, cricket and golf; assessment of changes to gambling regulation; and the behaviour of lottery players.
Ian has consulted with, amongst others, football clubs, the Premier League, the Press Association, the Responsible Gambling Trust (GambleAware), the General Medical Council, and several bookmakers. In 2005, Ian created the EA SPORTS Player Performance Indicator, the official player ratings system of the Barclays Premier League.