Richard Grieve is a Professor of Health Economics Methodology at the London School of Hygiene and Tropical Medicine (LSHTM). He holds a Senior Research Fellowship from the National Institute of Health Research (NIHR), which aims to improve analytical methods for decision-making. Since 2002, Richard has led a research programme on the design and analysis of observational studies for establishing relative effectiveness and cost-effectiveness. Richard has provides scientific advice to NICE, and has contributed to Decision Support Unit (DSU) Technical Support Documents on the appropriate use of observational data. Richard also advises the Department of Health in England on how to improve the use of evidence from observational studies for policy-making purposes. Richard has published more than 90 articles in peer-reviewed journals, and secured about £25 million in research grants from the research councils, NIHR, and the DoH.