J. N. K. Rao is Distinguished Research Professor at Carleton University, Ottawa, Canada. He is coauthor of Small Area Estimation, 2nd ed., Wiley, 2015. His research interests and publications include small area estimation, analysis of survey data, missing data and imputation, integration of probability and non-probability samples, Bayesian methods for survey data. He is a consultant to Statistics Canada since 1974 and served on several advisory committees on survey methodology.