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An Introduction to Generalized Estimating Equations and an Application to Assess Selectivity Effects in a Longitudinal Study on Very Old Individuals

University of Geneva

Dario Spini

University of Lausanne

Correlated data are very common in the social sciences. Most common applications include longitudinal and hierarchically organized (or clustered) data. Generalized estimating equations (GEE) are a convenient and general approach to the analysis of several kinds of correlated data. The main advantage of GEE resides in the unbiased estimation of population-averaged regression coefficients despite possible misspecification of the correlation structure. This article aims to provide a concise, nonstatistical introduction to GEE. To illustrate the method, an analysis of selectivity effects in the Swiss Interdisciplinary Longitudinal Study on the Oldest Old is presented.

Key Words: clustered data • generalized estimating equations • population-averaged method • selectivity effects

Journal of Educational and Behavioral Statistics, Vol. 29, No. 4, 421-437 (2004)
DOI: 10.3102/10769986029004421


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