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Stochastic interest model driven by compound Poisson process and Brownian motion with applications in life contingencies

1 School of Statistics, Qufu Normal University, Qufu, Shandong 273165, China
2 School of Statistics and Information, Shanghai University of International Business and Economics, Shanghai 201620, China
3 MRC Biostatistics Unit, University of Cambridge, Cambridge, CB2 0SR, UK

In this paper, we introduce a class of stochastic interest model driven by a compoundPoisson process and a Brownian motion, in which the jumping times of force of interest obeyscompound Poisson process and the continuous tiny fluctuations are described by Brownian motion, andthe adjustment in each jump of interest force is assumed to be random. Based on the proposed interestmodel, we discuss the expected discounted function, the validity of the model and actuarial presentvalues of life annuities and life insurances under different parameters and distribution settings. Ournumerical results show actuarial values could be sensitive to the parameters and distribution settings,which shows the importance of introducing this kind interest model.
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© 2018 the Author(s), licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0)

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