Mathematics – Probability
Scientific paper
2005-05-12
Annals of Applied Probability 2005, Vol. 15, No. 2, 1445-1450
Mathematics
Probability
Published at http://dx.doi.org/10.1214/105051605000000016 in the Annals of Applied Probability (http://www.imstat.org/aap/) by
Scientific paper
10.1214/105051605000000016
The natural analogue for a Levy process of Cramer's estimate for a reflected random walk is a statement about the exponential rate of decay of the tail of the characteristic measure of the height of an excursion above the minimum. We establish this estimate for any Levy process with finite negative mean which satisfies Cramer's condition, and give an explicit formula for the limiting constant. Just as in the random walk case, this leads to a Poisson limit theorem for the number of ``high excursions.''
Doney Ron Arthur
Maller Ross A.
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