This book is about tax and social policy and how they interact with each other. The impact of taxation as an instrument of social policy is central in influencing redistribution and behaviour. This broad-based edited collection fills a significant gap in both literatures, bringing together disparate debates in this emerging area of analysis. It guides readers through the key interactions of tax and social policies and the central debates and challenges posed by their effect on each other. It examines how analyses might be combined and policy options developed for more effective delivery and impact in both areas.