Mixtures of hierarchical topics with Pachinko allocation

  title={Mixtures of hierarchical topics with Pachinko allocation},
  author={David M. Mimno and Wei Li and Andrew McCallum},
The four-level pachinko allocation model (PAM) (Li & McCallum, 2006) represents correlations among topics using a DAG structure. It does not, however, represent a nested hierarchy of topics, with some topical word distributions representing the vocabulary that is shared among several more specific topics. This paper presents hierarchical PAM---an enhancement that explicitly represents a topic hierarchy. This model can be seen as combining the advantages of hLDA's topical hierarchy… CONTINUE READING
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