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On diversity under a Bayesian nonparametric dependent model

Rousseau, Judith; Mengersen, Kerrie; Arbel, Julyan (2014), On diversity under a Bayesian nonparametric dependent model, SIS 2014, 2014-06, Cagliari, Italie

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sis_2014_2936.pdf (156.8Kb)
Type
Communication / Conférence
External document link
http://www.sis2014.it/proceedings/allpapers/2936.pdf
Date
2014
Conference title
SIS 2014
Conference date
2014-06
Conference city
Cagliari
Conference country
Italie
Pages
7
Metadata
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Author(s)
Rousseau, Judith
Mengersen, Kerrie
Arbel, Julyan cc
Abstract (EN)
We present a dependent Bayesian nonparametric model for the proba- bilistic modelling of species-by-site data, i.e. population data where observations at different sites are classified into distinct species. We use a dependent version of the Griffiths-Engen-McCloskey distribution, the distribution of the weights of the Dirichlet process, in the same lines as the Dependent Dirichlet process is defined. The prior is thus defined via the stick-breaking construction. Some distributional properties of this model are presented.
Abstract (other language)
Presentiamo un modello parametrico bayesiano dipendente per la model- lazione probabilistica dei dati specie per siti, cio ́ e i dati sulla popolazione in cui le osservazioni in diversi siti sono classificati in specie distinte. Usiamo una versione dipendente della distribuzione Griffiths-Engen-McCloskey, la distribuzione dei pesi del processo di Dirichlet, in analogia con la definizione del processo di Dirichlet dipendente. La distribuzione a priori ́ e definita tramite la costruzione stick-breaking. Alcune propriet ` a distributive di questo modello sono presentate.
Subjects / Keywords
Stick-breaking representation; Griffiths-Engen- McCloskey distribution; Covariate-dependent mode; Bayesian nonparametrics
JEL
C11 - Bayesian Analysis: General

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