December 2013 Stein's method for the Beta distribution and the Pólya-Eggenberger urn
Larry Goldstein, Gesine Reinert
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J. Appl. Probab. 50(4): 1187-1205 (December 2013). DOI: 10.1239/jap/1389370107


Using a characterizing equation for the beta distribution, Stein's method is applied to obtain bounds of the optimal order for the Wasserstein distance between the distribution of the scaled number of white balls drawn from a Pólya-Eggenberger urn and its limiting beta distribution. The bound is computed by making a direct comparison between characterizing operators of the target and the beta distribution, the former derived by extending Stein's density approach to discrete distributions. In addition, refinements are given to Döbler's (2012) result for the arcsine approximation for the fraction of time a simple random walk of even length spends positive, and so also to the distributions of its last return time to 0 and its first visit to its terminal point, by supplying explicit constants to the present Wasserstein bound and also demonstrating that its rate is of the optimal order.


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Larry Goldstein. Gesine Reinert. "Stein's method for the Beta distribution and the Pólya-Eggenberger urn." J. Appl. Probab. 50 (4) 1187 - 1205, December 2013.


Published: December 2013
First available in Project Euclid: 10 January 2014

zbMATH: 1304.60033
MathSciNet: MR3161381
Digital Object Identifier: 10.1239/jap/1389370107

Primary: 60F05
Secondary: 60K99 , 62E20

Keywords: arcsine distribution , Beta distribution , Stein's method , urn model

Rights: Copyright © 2013 Applied Probability Trust


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Vol.50 • No. 4 • December 2013
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