Clustering Upper Level Units in Multilevel Models for Ordinal Data

  • Leonardo GrilliEmail author
  • Agnese Panzera
  • Carla Rampichini
Conference paper
Part of the Studies in Classification, Data Analysis, and Knowledge Organization book series (STUDIES CLASS)


We consider an explorative method for unsupervised clustering of upper level units in a two-level hierarchical setting. The idea lies in applying a density-based clustering algorithm to the predicted random effects obtained from a multilevel cumulative logit model. We illustrate the proposed approach throughout the analysis of data from European Social Survey about political trust in European countries.


Density-based clustering Empirical Bayes predictions European Social Survey Proportional odds model Random effects 


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Copyright information

© Springer International Publishing AG 2018

Authors and Affiliations

  • Leonardo Grilli
    • 1
    Email author
  • Agnese Panzera
    • 1
  • Carla Rampichini
    • 1
  1. 1.Department of Statistics, Computer ScienceApplications ‘G. Parenti’ University of FlorenceFlorenceItaly

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