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A singular stochastic control problem with interconnected dynamics

Author

Listed:
  • Federico, Salvatore

    (Center for Mathematical Economics, Bielefeld University)

  • Ferrari, Giorgio

    (Center for Mathematical Economics, Bielefeld University)

  • Schuhmann, Patrick

    (Center for Mathematical Economics, Bielefeld University)

Abstract

In this paper we study a Markovian two-dimensional bounded-variation stochastic control problem whose state process consists of a diffusive mean-reverting component and of a purely controlled one. The main problem's characteristic lies in the interaction of the two components of the state process: the mean-reversion level of the diffusive component is an affine function of the current value of the purely controlled one. By relying on a combination of techniques from viscosity theory and free-boundary analysis, we provide the structure of the value function and we show that it satisfies a second-order smooth-fit principle. Such a regularity is then exploited in order to determine a system of functional equations solved by the two monotone continuous curves (free boundaries) that split the control problem's state space in three connected regions. Further properties of the free boundaries are also obtained.

Suggested Citation

  • Federico, Salvatore & Ferrari, Giorgio & Schuhmann, Patrick, 2025. "A singular stochastic control problem with interconnected dynamics," Center for Mathematical Economics Working Papers 714, Center for Mathematical Economics, Bielefeld University.
    • Handle: RePEc:bie:wpaper:714
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    File URL: https://pub.uni-bielefeld.de/download/3004915/3004916
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