Stanislav Kolenikov is Principal Survey Scientist at Abt SRBI, a US-based survey, opinion, and public policy research firm known for its rigorous and innovative methodologies. His interests and expertise are in survey statistics and methodology, including optimal sampling design, estimation and inference with complex survey data, imputation of missing data ,and other challenging topics bridging survey statistics and methodology. Prior to joining Abt SRBI, Dr. Kolenikov worked as a consultant for the World Bank and Assistant Professor of Statistics at University of Missouri, Columbia.