A dimensionally reduced finite mixture model for multilevel data

Daniela G. Calò and Cinzia Viroli

Journal of Multivariate Analysis, 2010, vol. 101, issue 10, 2543-2553

Abstract: Recently, different mixture models have been proposed for multilevel data, generally requiring the local independence assumption. In this work, this assumption is relaxed by allowing each mixture component at the lower level of the hierarchical structure to be modeled according to a multivariate Gaussian distribution with a non-diagonal covariance matrix. For high-dimensional problems, this solution can lead to highly parameterized models. In this proposal, the trade-off between model parsimony and flexibility is governed by assuming a latent factor generative model.

Keywords: Cluster; analysis; Factor; mixture; model; Dimension; reduction; EM-algorithm; Multilevel; latent; class; analysis (search for similar items in EconPapers)
Date: 2010
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