Variance reduction in a stochastic volatility scenario.
Guerra, Maria Letizia, Sorini, Laerte (2007)
APPS. Applied Sciences
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Guerra, Maria Letizia, Sorini, Laerte (2007)
APPS. Applied Sciences
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Jan Iwanik (2007)
Applicationes Mathematicae
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This paper is an attempt to present and analyse stochastic mortality models. We propose a couple of continuous-time stochastic models that are natural generalizations of the Gompertz law in the sense that they reduce to the Gompertz function when the volatility parameter is zero. We provide a statistical analysis of the available demographic data to show that the models fit historical data well. Finally, we give some practical examples for the multidimensional models.
Mohamed Kayid, Salman Izadkhah, Dalal ALmufarrej (2016)
Applications of Mathematics
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By considering a covariate random variable in the ordinary proportional mean residual life (PMRL) model, we introduce and study a general model, taking more situations into account with respect to the ordinary PMRL model. We investigate how stochastic structures of the proposed model are affected by the stochastic properties of the baseline and the mixing variables in the model. Several characterizations and preservation properties of the new model under different stochastic orders and...
P. Todorović (1967)
Matematički Vesnik
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Soize, C., Batou, A. (2008)
Mathematical Problems in Engineering
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Beáta Stehlíková, Daniel Ševčovič (2009)
Kybernetika
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In this paper we are interested in term structure models for pricing zero coupon bonds under rapidly oscillating stochastic volatility. We analyze solutions to the generalized Cox–Ingersoll–Ross two factors model describing clustering of interest rate volatilities. The main goal is to derive an asymptotic expansion of the bond price with respect to a singular parameter representing the fast scale for the stochastic volatility process. We derive the second order asymptotic expansion of...
Fabio Bagarello (2006)
Banach Center Publications
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H. L. Smith, R. T. Trevino (2009)
Mathematical Modelling of Natural Phenomena
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We construct a stochastic model of bacteriophage parasitism of a host bacteria that accounts for demographic stochasticity of host and parasite and allows for multiple bacteriophage adsorption to host. We analyze the associated deterministic model, identifying the basic reproductive number for phage proliferation, showing that host and phage persist when it exceeds unity, and establishing that the distribution of adsorbed phage on a host is binomial with slowly evolving mean. Not surprisingly,...