A Unified Approach to Stein's Method for Stable Distributions

In this article, we first review the connection between Lévy processes and infinitely divisible random variables, and the classification of infinitely divisible distributions. Using this connection and the Lévy-Khinchine representation of the characteristic function, we establish a Stein identity for an infinitely divisible random variable. The classification and slight modification in approach give us a Stein identity for an $α$-stable random variable with $α\in (0,2).$ Using fine regularity estimates for the solution to Stein equation, we derive error bounds for $α$-stable approximations. We then apply these results to obtain rates of convergence. Finally, we compare these rates with the results available in the literature.

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