Abstract
The growth curve model is useful for the analysis of longitudinal data. It helps investigate an overall pattern of change in repeated measurements over time and the effects of time-invariant explanatory variables on the temporal pattern. The traditional growth curve model assumes that the matrix of covariances between repeated measurements is unconstrained. This unconstrained covariance matrix often appears unattractive. In this paper, the generalized estimating equation method is adopted to estimate parameters of the growth curve model. As a result, the proposed method allows a more variety of constrained covariance structures than the traditional growth curve model. An empirical application is provided so as to illustrate the proposed method.
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The work reported in this paper was supported by Grant 290439 and Grant A6394 from the Natural Sciences and Engineering Research Council of Canada to the first and second authors, respectively. We thank Terry Duncan for his alcohol use data. The alcohol use data were made available by Grant DA09548 from the National Institute on Drug Abuse.
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Hwang, H., Takane, Y. Estimation of Growth Curve Models with Structured Error Covariances by Generalized Estimating Equations. Behaviormetrika 32, 155–163 (2005). https://doi.org/10.2333/bhmk.32.155
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DOI: https://doi.org/10.2333/bhmk.32.155