Moment estimates for Lévy Processes
Résumé
For real Lévy processes $(X_t)_{t \geq 0}$ having no Brownian component with Blumenthal-Getoor index $\beta$, the estimate $\E \sup_{s \leq t} | X_s - a_p s |^p \leq C_p t$ for every $t \!\in [0,1]$ and suitable $a_p \!\in \R$ has been established by Millar \cite{MILL} for $\beta < p \leq 2$ provided $X_1 \!\in L^p$. We derive extensions of these estimates to the cases $p > 2$ and $p \leq\beta$.
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