Tail asymptotics for dependent subexponential differences

Tail asymptotics for dependent subexponential differences
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相关次指数差的尾部渐近

DOI:
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发表时间:
2012
期刊:
影响因子:
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通讯作者:
D. Kortschak
D. Kortschak
中科院分区:
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文献类型:
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作者:
H. Albrecher;S. Asmussen;D. Kortschak;D. Kortschak

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本文研究了当u → ∞时,随机变量X为次指数,Y为正数,且X和Y可以相依的情形下,n(X-Y> u)的渐近行为。我们给出了一个准则,在该准则下,Y的减法不改变X的尾部行为。它还研究了在什么条件下,共单调copula代表最坏情况下的渐近行为的意义上最小化X-Y的尾巴。在其他情况下,提供了最坏情况copula的一些明确的构造。
We study the asymptotic behavior of ℙ(X − Y > u) as u → ∞, where X is subexponential, Y is positive, and the random variables X and Y may be dependent. We give criteria under which the subtraction of Y does not change the tail behavior of X. It is also studied under which conditions the comonotonic copula represents the worst-case scenario for the asymptotic behavior in the sense of minimizing the tail of X − Y. Some explicit construction of the worst-case copula is provided in other cases.
DOI: 10.1007/978-1-4419-9473-8
发表时间: 2011-01-01
期刊: INTRODUCTION TO HEAVY-TAILED AND SUBEXPONENTIAL DISTRIBUTION
影响因子: --
作者:
Foss, Sergey;Korshunov, Dmitry;Zachary, Stan
通讯作者: Zachary, Stan