Nesta quarta-feira, 19/02/25, às 14h, teremos uma palestra especial do Professor
Danny Pfeffermann (University of Southampton/Hebrew University of Jerusalem).
🌍 Local: Sala C-116, Bloco C, Centro de Tecnologia, UFRJ.
📗 Título: Official Statistics on Population Parameters from a Non probability Sample or by Integration with a Probability Sample
📖 Resumo: 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.
Todos são muito bem-vindos!