Fisher's Information for Discretely Sampled Lévy Processes

Econometrica · 2008 · Volume 76 · Issue 4

DOI: 10.1111/j.1468-0262.2008.00858.x

Abstract

This paper studies the asymptotic behavior of Fisher's information for a Lévy process discretely sampled at an increasing frequency. As a result, we derive the optimal rates of convergence of efficient estimators of the different parameters of the process and show that the rates are often nonstandard and differ across parameters. We also show that it is possible to distinguish the continuous part of the process from its jumps part, and even different types of jumps from one another.

Keywords

Lévy process, jumps, rate of convergence, optimal estimation

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