Annals of Statistics
- Ann. Statist.
- Volume 20, Number 3 (1992), 1203-1221.
Polya Trees and Random Distributions
Trees of Polya urns are used to generate sequences of exchangeable random variables. By a theorem of de Finetti each such sequence is a mixture of independent, identically distributed variables and the mixing measure can be viewed as a prior on distribution functions. The collection of these Polya tree priors forms a convenient conjugate family which was mentioned by Ferguson and includes the Dirichlet processes of Ferguson. Unlike Dirichlet processes, Polya tree priors can assign probability 1 to the class of continuous distributions. This property and a few others are investigated.
Ann. Statist., Volume 20, Number 3 (1992), 1203-1221.
First available in Project Euclid: 12 April 2007
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Mauldin, R. Daniel; Sudderth, William D.; Williams, S. C. Polya Trees and Random Distributions. Ann. Statist. 20 (1992), no. 3, 1203--1221. doi:10.1214/aos/1176348766. https://projecteuclid.org/euclid.aos/1176348766