Mešić, Anamarija (2014) Teorija propasti i De Vylderova aproksimacija. Diploma thesis, Faculty of Science > Department of Mathematics.

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Abstract
In this study we observed the CramérLundberg model in the theory of risk. It consists of the assumption that the aggregate claims process is a compound Poisson process. In the first chapter we defined a compound Poisson process, and gave relevant definitions and extracts that we would later use. We defined a surplus process as opposed to the sum of the insurer’s surplus at time 0 and the insurer’s rate of premium income per unit time and aggregate claims at time t. We deduced a formula for the probability that the surplus process is less than 0 at some time t, and gave an upper bound for that probability. In addition to the ruin probability, we also defined the survival probability. Since in some cases the formula for the probability of ruin can not be explicitly calculated, we established some approximations thereof. In the third chapter, we define two approximations, the De Vylder approximation and the 4MGDV approximation. In case of exponentially distributed individual claim amounts, we observed that the De Vylder approximation gives exact results. We also concluded that the 4MGDV approximation gives better results than the De Vylder approximations.
Item Type:  Thesis (Diploma thesis) 

Supervisor:  Šikić, Hrvoje 
Date:  2014 
Number of Pages:  39 
Subjects:  NATURAL SCIENCES > Mathematics 
Divisions:  Faculty of Science > Department of Mathematics 
Depositing User:  Iva Prah 
Date Deposited:  05 Jun 2015 11:13 
Last Modified:  05 Jun 2015 11:13 
URI:  http://digre.pmf.unizg.hr/id/eprint/4014 
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