Abstract
This paper deals with the optimal control of a stochastic delay differential equation arising in the management of a pension fund with surplus. The problem is approached by the tool of a representation in infinite dimension. We show the equivalence between the one-dimensional delay problem and the associated infinite-dimensional problem without delay. Then we prove that the value function is continuous in this infinite-dimensional setting. These results represent a starting point for the investigation of the associated infinite-dimensional Hamilton–Jacobi–Bellman equation in the viscosity sense and for approaching the problem by numerical algorithms. Also an example with complete solution of a simpler but similar problem is provided.
Similar content being viewed by others
References
Asea, P.K., Zak, P.J.: Time-to-build and cycles. J. Econ. Dyn. Control 23, 1155–1175 (1999)
Bambi, M.: Endogenous growth and time to build: the AK case. J. Econ. Dyn. Control 32, 1015–1040 (2008)
Barles, G., Souganidis, P.E.: Convergence of approximation schemes for fully nonlinear second order equations. Asymptot. Anal. 4, 271–283 (1991)
Bensoussan, A., Da Prato, G., Delfour, M.C., Mitter, S.K.: Representation and Control of Infinite Dimensional Systems, 2nd edn. Birkhäuser, Basel (2007)
Boulier, J.F., Huang, S.J., Taillard, G.: Optimal management under stochastic interest rates: the case of a protected pension fund. Insur. Math. Econ., 28, 173–189 (2001)
Brace, A., Ga̧tarek, D., Musiela, M.: The market model of interest rate dynamics. Math. Finance 7, 127–155 (1997)
Cairns, A.J.G., Blake, D., Dowd, K.: Stochastic lifestyling: optimal dynamic asset allocation for defined contribution pension plans. J. Econ. Dyn. Control 30, 843–877 (2006)
Cannarsa, P., Da Prato, G.: Second-order Hamilton–Jacobi equations in infinite dimensions. SIAM J. Control Optim. 29, 474–492 (1991)
Cannarsa, P., Gozzi, F., Soner, H.M.: A boundary-value problem for Hamilton–Jacobi equations in Hilbert spaces. Appl. Math. Optim., 24, 197–220 (1991)
Chang, M.H., Pang, T., Pemy, M.: Finite difference approximations for stochastic control systems with delay. Stoch. Anal. Appl. 26, 451–470 (2008)
Chojnowska-Michalik, A.: Representation theorem for general stochastic delay equations. Bull. Acad. Pol. Sci., Sér. Sci. Math. Astron. Phys. 26, 635–642 (1978)
Da Prato, G., Barbu, V.: Hamilton–Jacobi Equation in Hilbert Spaces. Pitman Advanced Publications Program. Pitman, London (1983)
Da Prato, G., Zabczyk, J.: Stochastic Equations in Infinite Dimensions. Encyclopedia of Mathematics and Its Applications. Cambridge University Press, Cambridge (1992)
Da Prato, G., Zabczyk, J.: Ergodicity for Infinite Dimensional Systems. London Mathematical Society Lecture Note Series, vol. 229. Cambridge University Press, Cambridge (1996)
Deelstra, G., Grasselli, M., Koehl, P.F.: Optimal design of a guarantee for defined contribution funds. J. Econ. Dyn. Control, 28, 2239–2260 (2004)
Di Giacinto, M., Federico, S., Gozzi, F.: Pension funds with a minimum guarantee: A stochastic control approach. Finance Stoch. (2010). doi:10.1007/s00780-010-0127-7
Ekeland, I., Taflin, E.: A theory of bond portfolios. Ann. Appl. Probab. 15, 1260–1305 (2005)
Ekeland, I., Temam, R.: Convex Analysis and Variational Problems. North-Holland, Amsterdam (1976)
El Karoui, N., Jeanblanc, M., Lacoste, V.: Optimal portfolio management with American capital guarantee. J. Econ. Dyn. Control, 29, 449–468 (2005)
Elsanousi, I., Øksendal, B., Sulem, A.: Some solvable stochastic control problems with delay. Stoch. Stoch. Rep., 71, 69–89 (2000)
Federico, S.: Stochastic optimal control problems for pension funds management. PhD Thesis, Scuola Normale Superiore (2009). http://sfederico.altervista.org/
Federico, S., Øksendal, B.: Optimal stopping of stochastic differential equations with delay driven by a Lévy noise. Potential Anal. (2010). doi:10.1007/s11118-010-9187-8. http://www.cma.uio.no/reports/preprints/
Federico, S., Goldys, B., Gozzi, F.: HJB equations for the optimal control of differential equations with delays and state constraints, I: regularity and applications. SIAM J. Control Optim. 48(8), 4821–5546 (2010)
Federico, S., Goldys, B., Gozzi, F.: HJB equations for the optimal control of differential equations with delays and state constraints, II: optimal feedbacks and approximations. SIAM J. Control Optim. (2009, submitted). arXiv:0907.1603
Filipović, D.: Consistency Problems for Heath–Jarrow–Morton Interest Rate Models. Lecture Notes in Mathematics, vol. 1760. Springer, Berlin (2001)
Fischer, M., Nappo, G.: Time discretisation and rate of convergence for the optimal control of continuous-time stochastic systems with delay. Appl. Math. Optim. 57, 177–206 (2008)
Fischer, M., Reiss, M.: Discretisation of stochastic control problems for continuous time dynamics with delay. J. Comput. Appl. Math. 205, 969–981 (2007)
Gabay, D., Grasselli, M.: Fair demographic risk sharing in defined contribution pension funds. Working paper ESILV (2010). http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1667579
Gerrard, R., Haberman, S., Vigna, E.: Optimal investment choices post retirement in a defined contribution pension scheme. Insur. Math. Econ. 35, 321–342 (2004)
Goldys, B., Musiela, M., Sondermann, D.: Lognormality of rates and term structure models. Stoch. Anal. Appl. 18, 375–396 (2000)
Gozzi, F., Marinelli, C.: Stochastic optimal control of delay equations arising in advertising models. In: Da Prato, G., Tubaro, L. (eds.) Stochastic Partial Differential Equations and Applications VII. Lecture Notes in Pure and Applied Mathematics, vol. 245, pp. 133–148. Chapman & Hall, London (2006)
Gozzi, F., Marinelli, C., Savin, S.: On controlled linear diffusions with delay in a model of optimal advertising under uncertainty with memory effects. J. Optim. Theory Appl. 142, 291–321 (2009)
Heath, D.C., Jarrow, R.A., Morton, A.: Bond pricing and term structures of interest rates: a new methodology for contingent claim valuation. Econometrica 60, 77–105 (1992)
Karatzas, I., Shreve, S.E.: Brownian Motion and Stochastic Calculus, 2nd edn. Springer, New York (1991)
Kelome, D., Swiech, A.: Viscosity solution of an infinite-dimensional Black–Scholes–Barenblatt equation. Appl. Math. Optim. 47, 253–278 (2003)
Kocan, M., Soravia, P.: A viscosity approach to infinite-dimensional Hamilton–Jacobi equations arising in optimal control with state constraints. SIAM J. Control Optim. 36, 1348–1375 (1998)
Kolmanovskii, V.B., Shaikhet, L.E.: Control of Systems with Aftereffect. Translations of Mathematical Monographs, vol. 157. American Mathematical Society, Providence (1996)
Kushner, H.J.: Probability Methods for Approximations in Stochastic Control and for Elliptic Equations. Academic Press, New York (1977)
Kushner, H.J.: Numerical approximations for stochastic systems with delays in the state and control. Stochastics 78, 343–376 (2006)
Kydland, F.E., Prescott, E.C.: Time-to-build and aggregate fluctuations. Econometrica 50, 1345–1370 (1982)
Larssen, B.: Dynamic programming in stochastic control of systems with delay. Stoch. Stoch. Rep. 74, 651–673 (2002)
Larssen, B., Risebro, N.H.: When are HJB equations for control problems with stochastic delay equations finite dimensional? Stoch. Anal. Appl. 21, 643–671 (2003)
Mohammed, S.E.: Stochastic Functional Differential Equations. Research Notes in Mathematics, vol. 99. Pitman, London (1984)
Øksendal, B., Sulem, A.: A maximum principle for optimal control of stochastic systems with delay with applications to finance. In: Menaldi, J.L., Rofman, E., Sulem, A. (eds.) Optimal Control and PDE. Essays in Honour of Alain Bensoussan, pp. 64–79. IOS Press, Amsterdam (2001)
Øksendal, B., Zhang, H.: Optimal control with partial information for stochastic Volterra equations. Int. J. Stoch. Anal. 2010, 329185 (2010). doi:10.1155/2010/329185
Sbaraglia, S., Papi, M., Briani, M., Bernaschi, M., Gozzi, F.: A model for the optimal asset-liability management for insurance companies. Int. J. Theor. Appl. Finance 6, 277–299 (2003)
Vargiolu, T.: Invariant measures for the Musiela equation with deterministic diffusion term. Finance Stoch. 3, 483–492 (1999)
Vinter, R.B., Kwong, R.H.: The infinite time quadratic control problem for linear systems with state and control delays: An evolution equation approach. SIAM J. Control Optim. 19, 139–153 (1981)
Yong, J., Zhou, X.Y.: Stochastic Controls: Hamiltonian Systems and HJB Equations. Springer, New York (1999)
Author information
Authors and Affiliations
Corresponding author
Additional information
Dedicated to my father.
Rights and permissions
About this article
Cite this article
Federico, S. A stochastic control problem with delay arising in a pension fund model. Finance Stoch 15, 421–459 (2011). https://doi.org/10.1007/s00780-010-0146-4
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00780-010-0146-4
Keywords
- Pension funds
- Stochastic optimal control with delay
- Infinite-dimensional Hamilton–Jacobi–Bellman equations
- Viscosity solutions