This volume presents Richard Blundell's outstanding research on the modern economic analysis of labor markets and public policy reforms. Professor Blundell's hugely influential work has enhanced greatly our understanding of how individuals' behavior on the labor market respond to taxation andsocial policy influence. Edited by IZA, this volume brings together the author's key papers, some co-authored and some unpublished, with new introductions and an epilogue. It covers some of the main research insights in the study of labor supply. The question of how individuals adapt their behaviorin response to policy changes is one of the most investigated topics in empirical labor and public economics. Do people reduce their working hours if governments decide to raise taxes? Might they even withdraw completely from the labor market? Labor supply estimations are extensively used for various policy analyses and economic research. Labor supply elasticities are key information when evaluating tax-benefit policy reforms and their effect on tax revenue, employment, and redistribution. The chapters cover empirical and theoreticaldevelopments as well as applications to tax and welfare reform, and each represents a substantive research contribution from Blundell's publications in top research outlets.