David Hand is Senior Research Investigator and Emeritus Professor of Mathematics at Imperial College, London. A past president of the Royal Statistical Society, he is on the Board of the UK Statistics Authority and the European Statistics Advisory Committee, and chairs the Administrative Data Research Network. He is also Chief Scientific Advisor to Winton Capital Management. He has a lifelong interest in the use of data, especially large data sets, for public good, and has served on the Expert Statistics panel of AstraZeneca, the Biometrics Advisory Board of GSK, and the Methodology Advisory Committee of the ONS, as well as working closely with many bodies in the retail credit sector. In 2013 he was made OBE for services to research and innovation, and in 2016 received the George Box medal for outstanding contributions to business and industrial statistics. Recent books include The Improbability Principle, The Wellbeing of Nations, and Measurement: A Very Short Introduction.