Precise large deviations through a uniform Tauberian theorem

Giampaolo Cristadoro, Gaia Pozzoli

Published 2024-07-04Version 1

We derive a large deviation principle for families of random variables in the basin of attraction of spectrally positive stable distributions by proving a uniform version of the Tauberian theorem for Laplace-Stieltjes transforms. The main advantage of this method is that it can be easily applied to cases that are beyond the reach of the techniques currently used in the literature, such as random walks with long-ranged memory kernels or randomly stopped sums where the random time is not concentrated around its expectation. The method reveals the role of the characteristic function when Cram\'er's condition is violated and provides a unified approach within regular variation.