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Intra-cluster correlation structure in longitudinal data analysis: Selection criteria and misspecification tests

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  • Xu, Jianwen
  • Wang, You-Gan

Abstract

Selection criteria and misspecification tests for the intra-cluster correlation structure (ICS) in longitudinal data analysis are considered. In particular, the asymptotical distribution of the correlation information criterion (CIC) is derived and a new method for selecting a working ICS is proposed by standardizing the selection criterion as the p-value. The CIC test is found to be powerful in detecting misspecification of the working ICS structures, while with respect to the working ICS selection, the standardized CIC test is also shown to have satisfactory performance. Some simulation studies and applications to two real longitudinal datasets are made to illustrate how these criteria and tests might be useful.

Suggested Citation

  • Xu, Jianwen & Wang, You-Gan, 2014. "Intra-cluster correlation structure in longitudinal data analysis: Selection criteria and misspecification tests," Computational Statistics & Data Analysis, Elsevier, vol. 80(C), pages 70-77.
    • Handle: RePEc:eee:csdana:v:80:y:2014:i:c:p:70-77
    DOI: 10.1016/j.csda.2014.06.013
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    References listed on IDEAS

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