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Asymptotics for randomly reinforced urns with random barriers

Berti, Patrizia and Crimaldi, Irene and Pratelli, Luca and Rigo, Pietro Asymptotics for randomly reinforced urns with random barriers. Journal of applied probability, 53 (4). pp. 1206-1220. ISSN 0021-9002 (2016)

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Abstract

An urn contains black and red balls. Let Zn be the proportion of black balls at time n and 0≤L<U≤1 random barriers. At each time n, a ball bn is drawn. If bn is black and Zn-1<U, then bn is replaced together with a random number Bn of black balls. If bn is red and Zn-1>L, then bn is replaced together with a random number Rn of red balls. Otherwise, no additional balls are added, and bn alone is replaced. In this paper we assume that Rn=Bn. Then, under mild conditions, it is shown that Zn→a.s.Z for some random variable Z, and Dn≔√n(Zn-Z)→

Item Type: Article
Identification Number: 10.1017/jpr.2016.75
Projects: crisis lab
Uncontrolled Keywords: Bayesian nonparametrics – Central limit theorem – Clinical trial – Random probability measure – Stable convergence – Urn model .
Subjects: H Social Sciences > HA Statistics
Q Science > QA Mathematics
Research Area: Economics and Institutional Change
Depositing User: Irene Crimaldi
Date Deposited: 24 Feb 2016 12:03
Last Modified: 19 Dec 2016 10:00
URI: http://eprints.imtlucca.it/id/eprint/3113

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