Tim Sass (Ph.D., Economics, University of Washington, 1984) is a Professor in the Department of Economics at Georgia State University. He was hired by the Andrew Young School to fulfill its GSU Second Century Initiative: a research group that will advance "Excellence in Evidence-based Policy and Performance Management." He has published over 25 peer-reviewed articles in scholarly journals and numerous contributions to books and monographs. He has been the principal investigator on a study of charter schools funded by the Spencer Foundation and co-PI on two USDOE-IES funded projects to study the determinants of regular education teacher effectiveness and to analyze the effects of teacher preparation on the quality of special education teachers. Dr. Sass has also served as co-PI on a grant project to evaluate the certification system of the National Board for Professional Teaching Standards. He has acted as a consultant to the RAND Corporation and the National Academies on various education policy issues and has served on advisory panels to the New York City and Washington DC public school systems. He is also a senior researcher at the National Center for Analysis of Longitudinal Data in Education Research (CALDER).