Estimating rates of rare events at multiple resolutions

@inproceedings{Agarwal2007EstimatingRO,
  title={Estimating rates of rare events at multiple resolutions},
  author={Deepak Agarwal and Andrei Z. Broder and Deepayan Chakrabarti and Dejan Diklic and Vanja Josifovski and Mayssam Sayyadian},
  booktitle={KDD},
  year={2007}
}
We consider the problem of estimating occurrence rates of rare eventsfor extremely sparse data, using pre-existing hierarchies to perform inference at multiple resolutions. In particular, we focus on the problem of estimating click rates for (webpage, advertisement) pairs (called impressions) where both the pages and the ads are classified into hierarchies that capture broad contextual information at different levels of granularity. Typically the click rates are low and the coverage of the… CONTINUE READING
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