Emmanuel Saez is a Professor of Economics at the University of California at Berkeley, and a Research Associate at the NBER. He received his PhD in Economics from MIT in 1999. He served as an Assistant Professor of Economics at Harvard University from 1999 to 2002, before joining the faculty at UC Berkeley in 2002. He is currently editor of the Journal of Public Economics. His main areas of research are centered around taxation, income inequality, and retirement savings. In the field of taxation, he has worked on optimal income taxation and transfer policy issues, as well as estimating behavioral responses to individual taxation. He has analyzed income and wealth concentration from a historical and international perspective. Recently, he has been interested in the effects of tax incentives for retirement savings.