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Second-order approximations for certain stopped sums in extended renewal theory

Published online by Cambridge University Press:  01 July 2016

Gerold Alsmeyer*
Affiliation:
University of Kiel
*
∗ Postal address: Mathematisches Seminar, Universität Kiel, Olshausenstraβe 40, D-2300 Kiel 1, W. Germany.

Abstract

Let (X0, Y0 ), (X1, Y 1), · ·· be a sequence of independent two-dimensional random vectors such that (X 1, Y 1), (X 2 , Y2 ), · ·· are i.i.d. Let {(Sn , Un )}n≧0 be the associated sum process, and define for t ≧ 0 Under suitable conditions on (X0 , Y 0) and (X1, Y 1) we derive expansions up to vanishing terms, as t→∞, for EUT(t) , Var UT(t) and Cov (UT(t) , T(t)). Corresponding results will be obtained for EUN(t) , Var UN (t) and Cov (UN (t) , N(t)) when X0, Χ 1 are both almost surely non-negative and

Information

Type
Research Article
Copyright
Copyright © Applied Probability Trust 1988 

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