Analysis of an Inverse First Passage Problem from Risk Management

نویسندگان

  • Lan Cheng
  • Xinfu Chen
  • John Chadam
  • David Saunders
چکیده

We study the following “inverse first passage time” problem. Given a diffusion process Xt and a probability distribution q on [0,∞), does there exist a boundary b(t) such that q(t) = P[τ ≤ t], where τ is the first hitting time of Xt to the time dependent level b(t). A free boundary problem for a parabolic partial differential operator is associated with the inverse first passage time problem. We prove the existence and uniqueness of a viscosity solution to this equation. We also investigate the small time behavior of the boundary b(t), presenting both upper and lower bounds. Finally, we derive some integral equations charaterizing the boundary.

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عنوان ژورنال:
  • SIAM J. Math. Analysis

دوره 38  شماره 

صفحات  -

تاریخ انتشار 2006