The authors of the ten chapters in this book review recent developments in social policies in OECD countries, focusing on the United States and the Republic of Korea, and examining the use of program evaluation in social policies and drawing lessons for policymakers. The contributions cover social and fiscal policy and issues in labor market policy, in addition to the effectiveness of social insurance, education and antipoverty policy. The policies outlined and lessons provided in the book will continue to be valuable to governments, and scholars of advanced and developing countries for decades to come, and to research institutes involved in government and social policy. D. Autor, B.-G. Chun, W. Chung, H. Kim, Y. Koh, A.B. Krueger, S.-H. Lee, H.-H. Li, H. Moon, D.W. Schanzenbach, J.K. Scholz, H. Yoo, J.P. Ziliak