Improving Classification When a Class Hierarchy is Available Using a Hierarchy-Based Prior

@article{Shahbaba2005ImprovingCW,
  title={Improving Classification When a Class Hierarchy is Available Using a Hierarchy-Based Prior},
  author={B. Shahbaba and R. Neal},
  journal={Bayesian Analysis},
  year={2005},
  volume={2},
  pages={221-237}
}
We introduce a new method for building classification models when we have prior knowledge of how the classes can be arranged in a hierarchy, based on how easily they can be distinguished. The new method uses a Bayesian form of the multinomial logit (MNL, a.k.a. “softmax”) model, with a prior that introduces correlations between the parameters for classes that are nearby in the tree. We compare the performance on simulated data of the new method, the ordinary MNL model, and a model that uses the… Expand
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