- Bayesian Anal.
- Advance publication (2018), 28 pages.
Gibbs-type Indian Buffet Processes
We investigate a class of feature allocation models that generalize the Indian buffet process and are parameterized by Gibbs-type random measures. Two existing classes are contained as special cases: the original two-parameter Indian buffet process, corresponding to the Dirichlet process, and the stable (or three-parameter) Indian buffet process, corresponding to the Pitman–Yor process. Asymptotic behavior of the Gibbs-type partitions, such as power laws holding for the number of latent clusters, translates into analogous characteristics for this class of Gibbs-type feature allocation models. Despite containing several different distinct subclasses, the properties of Gibbs-type partitions allow us to develop a black-box procedure for posterior inference within any subclass of models. Through numerical experiments, we compare and contrast a few of these subclasses and highlight the utility of varying power-law behaviors in the latent features.
Bayesian Anal., Advance publication (2018), 28 pages.
First available in Project Euclid: 19 June 2019
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Digital Object Identifier
Heaukulani, Creighton; Roy, Daniel M. Gibbs-type Indian Buffet Processes. Bayesian Anal., advance publication, 19 June 2019. doi:10.1214/19-BA1166. https://projecteuclid.org/euclid.ba/1560909812
- Supplementary Material: Gibbs-type Indian buffet processes.