The existence of moments for every distribution is an advantage for parameter estimation. There are several straightforward and efficient moment base estimators in classical statistics. However, lack of existence of the variance for non-Gaussian stable random variables is a drawback to introduce such an estimator. On the other hand, variance of many order statistics of an α-stable distribution exist. This is the main reason to make inference through the order statistics of a random sample of α-stable distribution. In other words, it can adapt well known order statistics-base estimators, such as L-estimator, best linear unbiased or invariant estimators for α-stable distribution parameters. In this paper, we prove the basic lemma about the existence of moments of stable distributions and propose new estimators using the results of the lemma.
A random variable X is said to have an α-stable (non-Gaussian α-stable) distribution if there are parameters 0