The Annals of Applied Probability
- Ann. Appl. Probab.
- Volume 18, Number 2 (2008), 521-551.
Distributions of linear functionals of two parameter Poisson–Dirichlet random measures
Lancelot F. James, Antonio Lijoi, and Igor Prünster
Full-text: Open access
Abstract
The present paper provides exact expressions for the probability distributions of linear functionals of the two-parameter Poisson–Dirichlet process PD(α, θ). We obtain distributional results yielding exact forms for density functions of these functionals. Moreover, several interesting integral identities are obtained by exploiting a correspondence between the mean of a Poisson–Dirichlet process and the mean of a suitable Dirichlet process. Finally, some distributional characterizations in terms of mixture representations are proved. The usefulness of the results contained in the paper is demonstrated by means of some illustrative examples. Indeed, our formulae are relevant to occupation time phenomena connected with Brownian motion and more general Bessel processes, as well as to models arising in Bayesian nonparametric statistics.
Article information
Source
Ann. Appl. Probab., Volume 18, Number 2 (2008), 521-551.
Dates
First available in Project Euclid: 20 March 2008
Permanent link to this document
https://projecteuclid.org/euclid.aoap/1206018196
Digital Object Identifier
doi:10.1214/07-AAP462
Mathematical Reviews number (MathSciNet)
MR2398765
Zentralblatt MATH identifier
1138.60040
Subjects
Primary: 60G57: Random measures
Secondary: 62F15: Bayesian inference 60E07: Infinitely divisible distributions; stable distributions 60G51: Processes with independent increments; Lévy processes
Keywords
α-stable subordinator Bayesian nonparametric statistics Cauchy–Stieltjes transform Cifarelli–Regazzini identity functionals of random probability measures occupation times Poisson–Dirichlet process
Citation
James, Lancelot F.; Lijoi, Antonio; Prünster, Igor. Distributions of linear functionals of two parameter Poisson–Dirichlet random measures. Ann. Appl. Probab. 18 (2008), no. 2, 521--551. doi:10.1214/07-AAP462. https://projecteuclid.org/euclid.aoap/1206018196
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