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What’s the difference between finite mixture models and cluster analysis?

February 24, 2017

Researchers are often interested in identifying subgroups within their data to better understand heterogeneity within the population under study. This task has been the traditional domain of cluster analysis, but over the past decade or so finite mixture models have become an increasingly preferred alternative analytic technique. Sometimes referred to as “model-based clustering” the finite…

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How many clusters do I need to fit a multilevel model?

February 6, 2017

In this edition of CBA Office Hours, Dan discusses a question that frequently comes up in our multilevel modeling workshop, namely, “How many clusters do I need to be able to fit a multilevel model?”  Here, clusters refers to upper-level units, so in the case of individuals nested within groups, the groups, and in the case of…

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