Duncan D. Chaplin is a senior researcher at Mathematica Policy Research and a consultant for the Urban Institute. As a specialist in labor economics and econometrics, he focuses on improving the methods used to estimate impacts of various education policies on academic and non-academic outcomes of students including high school and college graduation rates. Dr. Chaplin has served as principal investigator for over a dozen research projects, has supervised technical aspects of many others, and has provided advice and assistance to senior staff on complex econometric and sampling issues. Current work focuses on experimental analyses including one study of a grade 7 through 12 career planning intervention and another of a teacher incentive program. In December of 2003 he was named to a national expert panel on high school graduation and dropout rates and since 2005 he has served on the Graduation Rates Advisory Group of the Alliance for Excellent Education.