JSM 2004 - Toronto

Abstract #301323

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Activity Number: 107
Type: Topic Contributed
Date/Time: Monday, August 9, 2004 : 10:30 AM to 12:20 PM
Sponsor: Section on Survey Research Methods
Abstract - #301323
Title: Comparing Different Small-area Estimators of Income Parameters in Panel Surveys
Author(s): Maria R. Ferrante and Silvia Pacei and Enrico Fabrizi*+
Companies: University of Bologna and University of Bologna and Università di Bologna
Address: Via Belle Arti 41, Bologna, 40126, Italy
Keywords: average equivalized household income ; European Household Community Panel ; borrowing strength over time ; linear mixed models ; EBLUP estimators
Abstract:

In Italy, estimates of equivalized household income parameters can be obtained from the Bank of Italy Survey on Income or by the European Households Community Survey (EHCS), both designed to provide estimates for large areas within the country (NUTS1). In order to obtain reliable estimates on a smaller scale, we have considered the EHCS, that is an annual panel survey, for which several successive waves are now available. The EHCS conveys a lot of information covering various characteristics of the household, allows cross-country comparison, and shows a large overlapping over successive waves. Focusing on the estimation of income parameters, the aim of this work is to experiment different small-area linear mixed models and related EBLUP estimators, where individual autocorrelation over time is taken into account. Estimators considered are compared to "standard" small-area ones, such as those based on cross-sectional borrowing strength. Their performance is evaluated through a simulation study in which samples are drawn from a pseudo-population generated replicating the EHCS sample observations by sample weights.

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