Dr. Robert Fay is a senior statistician with 38 years of experience in multiple aspects of sample surveys, including survey design, estimation, variance estimation, imputation and analysis of missing data, statistical modeling of data from complex samples, and small area estimation. He joined Westat in January 2008, after retiring from the U.S. Census Bureau. He is a Fellow of the American Statistical Association, a Fellow of the American Association for the Advancement of Science, and a recipient of the Gold Medal Award from the Department of Commerce and of the Roger Herriot Award for Innovation in Federal Statistics.