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Scricciolo, Catia (2003) Asymptotics for Bayesian histograms. [Working Paper] WORKING PAPER SERIES, 13/2003 . , PADOVA (Inedito)

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Abstract (inglese)

We consider the problem of consistently estimating an unknown probability density function on a bounded interval from a sample of n independent and identically distributed univariate random variables. Adopting a Bayesian nonparametric approach, as first approximation, a hierarchical prior whose weak support comprises all absolutely continuous distribution functions, is considered that selects piecewise constant densities. The prior measure is constructed by putting a prior on the number of equal length bins and a Dirichtlet distribution on the bin values. Covergence rate for the Hellinger loss of the Bayes' estimator is deduced from the posterior rate, which is studied for various densities generating the data. This rate is comparable up to a logarithmic factor to that of the frequentist histogram estimator. Smoothing the Bayesian histogram, we get a continuous, piecewise linear competitor which possesses a faster rate of convergence.


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Tipo di EPrint:Working Paper
Anno di Pubblicazione:Luglio 2003
Settori scientifico-disciplinari MIUR:Area 13 - Scienze economiche e statistiche > SECS-S/01 Statistica
Struttura di riferimento:Dipartimenti > Dipartimento di Scienze Statistiche
Codice ID:7305
Depositato il:11 Dic 2014 13:19
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