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Comparing sums of exchangeable Bernoulli random variables

Published online by Cambridge University Press:  14 July 2016

Claude Lefèvre*
Affiliation:
Université Libre de Bruxelles
Sergey Utev*
Affiliation:
Novosibirsk University
*
Postal address: Institut de Statistique, CP 210, Université Libre de Bruxelles, Boulevard du Triomphe, B-1050 Bruxelles, Belgique.
∗∗Postal address: Institute of Mathematics, Universitetsky pr. 4, Novosibirsk 630090, Russia.

Abstract

The paper is first concerned with a comparison of the partial sums associated with two sequences of n exchangeable Bernoulli random variables. It then considers a situation where such partial sums are obtained through an iterative procedure of branching type stopped at the first-passage time in a linearly decreasing upper barrier. These comparison results are illustrated with applications to certain urn models, sampling schemes and epidemic processes. A key tool is a non-standard hierarchical class of stochastic orderings between discrete random variables valued in {0, 1,· ··, n}.

Type
Research Papers
Copyright
Copyright © Applied Probability Trust 1996 

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Footnotes

Research partially supported by the Fonds National de la Recherche Scientifique Belge.

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