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Optimal stopping time for stochastic processes in continuous time: an application to the employer’s profile formation option. (English) Zbl 1186.60037

This paper deals with the mathematical model of managing an employee’s professional profile formation by the employer. It is based on the optimal stopping theory for a continuous time stochastic processes [see G. Peskir and A. Shiryaev, Optimal stopping and free-boundary problems. Lectures in Mathematics, ETH Zürich. Basel: Birkhäuser (2006; Zbl 1115.60001); I. Karatzas and S. E. Shreve, Methods of mathematical finance. Applications of Mathematics. Berlin: Springer (1998; Zbl 0941.91032)] with finite horizon.
The authors continue the investigation from their articles [Panam. Math. J. 18, No. 3, 1–13 (2008; Zbl 1149.60023)] (a discrete-time framework) and [Far East J. Appl. Math. 33, No. 1, 121–140 (2008; Zbl 1153.91486)] (where specific numerical examples are presented). The problem of optimal stopping the discounted process \((\tilde{Z}_t)_{t\in\overline{0,T}}\) representing the possible profit when the educational activities are stopped at time \(\tau\in[0,T]\) is solved by the classical method of constructing Snell’s envelope. Using the Doob’s decomposition of the Snell’s envelope it is shown the existence of a self-financing strategy of hedging.

MSC:

60G40 Stopping times; optimal stopping problems; gambling theory
91B70 Stochastic models in economics
60J65 Brownian motion
93E20 Optimal stochastic control