In recent years, a rich variety of shrinkage priors have been proposed that have great promise in addressing massive regression problems. In general, these new priors can be expressed as scale mixtures of normals, but have more complex forms and better properties than traditional Cauchy and double exponential priors. We first propose a new class of normal scale mixtures through a novel generalized beta distribution that encompasses many interesting priors as special cases. This encompassing framework should prove useful in comparing competing priors, considering properties and revealing close connections. We then develop a class of variational Bayes approximations through the new hierarchy presented that will scale more efficiently to the types of truly massive data sets that are now encountered routinely.
Generalized Beta Mixtures of Gaussians
Artin Armagan,D. Dunson,M. Clyde
Published 2011 in Neural Information Processing Systems
ABSTRACT
PUBLICATION RECORD
- Publication year
2011
- Venue
Neural Information Processing Systems
- Publication date
2011-07-25
- Fields of study
Mathematics, Computer Science, Medicine
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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