Article,

Hitting, occupation and inverse local times of one-dimensional diffusions: Martingale and excursion approaches.

, and .
Bernoulli, 9 (1): 1-24 (2003)
DOI: 10.3150/bj/1068129008

Abstract

Summary: Basic relations between the distributions of hitting, occupation and inverse local times of a one-dimensional diffusion process $X$, first discussed by K. Itô and H. P. McKean jun. ``Diffusion processes and their sample paths'' (1965; Zbl 0127.09503), are reviewed from the perspectives of martingale calculus and excursion theory. These relations, and the technique of conditioning on $L^y_T$, the local time of $X$ at level $y$ before a suitable random time $T$, yield formulae for the joint Laplace transform of $L^y_T$ and the times spent by $X$ above and below level $y$ up to time $T$.

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