IASS Webinar 48: Official Statistics on Population Parameters from a Non-probability Sample or by Integration with a Probability Sample
| Date | 29 Jan 2025 |
| Time | 13:00 GMT+01:00 - 14:30 GMT+01:00 |
| Level of instruction | Intermediate |
| Instructor |
Danny Pfeffermann
|
| Registration fee | |
Description
Tightened budgets and constant decrease of response rates, due in part by increasing response burden in traditional surveys, have stimulated research into the use of non-probability sample data, which are often easier, faster and cheaper to collect. In this presentation, we consider the case where a non-probability sample with observations on variables Y and X is available, but this sample is exposed to selection bias. An informative probability sample, subject to NMAR nonresponse may also be available, but this sample only contains observations on X. By application of the empirical likelihood approach we show how to estimate the joint probabilities of (X,Y) and hence the total of the Y-values in the population, which the samples are supposed to represent, distinguishing between the case where a reference, probability sample is available and the case where only non-probability sample data are available. We illustrate and compare the performance of several methods by use of simulations and an application to a real data set.
Instructors
About the instructor
Danny Pfeffermann is Professor of Social Statistics at the University of Southampton, UK and Professor Emeritus of Statistics at the department of statistics and data science at the Hebrew University of Jerusalem, Israel. He also served for 9 years as the National Statistician and Director General of Israel's Central Bureau of Statistics. His main research areas are: Analytic inference from complex sample surveys; Seasonal adjustment and Trend estimation; Small area estimation; Inference under informative sampling and nonresponse; Mode effects and Proxy surveys and more recently, inference from non-probability samples. Professor Pfeffermann published many articles in leading statistical journals and co-edited the two-volume handbook on Sample Surveys. He was President of the Israel Statistical Society and of the International Association of Survey Statisticians (IASS), and is Fellow of the American Statistical Association (ASA), the International Statistical Institute (ISI) and the Institute of Mathematical Statistics (IMS).