Large Deviations View Points for Heavy-Tailed Random Walks
Large Deviations View Points for Heavy-Tailed Random Walks
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DOI:
10.1023/b:jotp.0000040298.43712.e8
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发表时间:
2004-07
影响因子:
0.8
通讯作者:
Y. Hu;H. Nyrhinen
中科院分区:
文献类型:
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作者:
Y. Hu;H. Nyrhinen
LetX1,X2,... be a sequence of i.i.d. non-negative random variables with heavy tails. W e study logarithmic asymptotics for the distributions of the partial sumsSn=X1+ ··· +Xn. Our main interest is in the crude estimatesP(Sn>nx) ≈n−αx+ 1for appropriate values ofxwhere α is a specific parameter. The related conjecture proposed by Gantert (Stat. Probab. Lett. 49, 113–118) is investigated.