Asia-Pacific Stats Café Series: Weighting, estimation, and imputation in mixed mode data collections

Ms Gemma Van Halderen has over thirty years of experience in government statistics and more recently, as Chief Data Officer in the Australian Government Department of Social Services. From 2018-2021, she was Director of the UN ESCAP Statistics Division and worked extensively with governments, multilateral agencies and the statistical community to support developing nations across Asia and the Pacific meet their data obligations under the 2030 Agenda for Sustainable Development and respond to the global COVID-19 pandemic.

Ms Van Halderen has been a member of the statistical profession since her undergraduate days, filling executive committee roles with her local branch of the Australian Statistical Society before expanding to the International Association for Official Statistics and becoming an elected member of the International Statistics Institute.  She was the focal point for the Association’s Young Statistician Prize from 2014-2023, and participated in World Statistics Congresses in Hong Kong, Malaysia, Brazil, Turkey and Australia.

Ms. Van Halderen holds an Honour’s degree in mathematical statistics from the Australian National University.

Haoyi Chen is the Coordinator of the Inter-Secretariat Working Group on Household Surveys. Before she joined the current position in September 2019, she led the programme on international migration statistics at the UN Statistics Division. She has also worked on various statistical areas including gender statistics, population censuses, civil registration and vital statistics. She holds a Ph.D degree in Statistics from the University of Florida.

Z. Tuba Suzer Gurtekin is an Assistant Research Scientist at the University of Michigan’s Institute for Social Research. Her research includes managing monthly surveys of consumer attitudes, expectations and behavior. Her published research focuses on methods to quantify nonresponse and measurement survey errors in probability and nonprobability sample surveys, and mixed-mode survey design and inference. Her research experience has included development of alternative sample, methodology and questionnaire designs, data collection and analysis methods for a general population in parallel survey modes. She also teaches Survey Sampling for Clinical Research at the University of Michigan’s Clinical Research Design and Statistical Analysis program (OJOC CRDSA).

Bruce Fraser is the Director of Household Statistics Methodology at the Australian Bureau of Statistics (ABS), leading the methodological support for ABS household survey, the population census, and demographic statistics. Bruce has 35 years experience with official statistics in Australia, including seven years in his current role. Bruce is also a member of the Pacific Statistics Methods Board.

Kevin McGee is a Senior Economist with the Living Standard Measurement Study (LSMS) team in the Development Data Group of the World Bank. His primary areas of research include poverty, agriculture, and health. He also specializes in survey design, methodology, and implementation. As a member of the LSMS-ISA team, he currently supervises ongoing survey activities in Nigeria and co-leads capacity building programs under the Center for Development Data (C4D2). He completed his PhD in economics at American University in 2014.