A generalised Gerber–Shiu measure for Markov-additive risk processes with phase-type claims and capital injections

Lothar Breuer and Andrei Badescu

Scandinavian Actuarial Journal, 2014, vol. 2014, issue 2, 93-115

Abstract: In this paper we consider a risk reserve process where the arrivals (either claims or capital injections) occur according to a Markovian point process. Both claim and capital injection sizes are phase-type distributed and the model allows for possible correlations between these and the inter-claim times. The premium income is modelled by a Markov-modulated Brownian motion which may depend on the underlying phases of the point arrival process. For this risk reserve model we derive a generalised Gerber–Shiu measure that is the joint distribution of the time to ruin, the surplus immediately before ruin, the deficit at ruin, the minimal risk reserve before ruin, and the time until this minimum is attained. Numeral examples illustrate the influence of the parameters on selected marginal distributions.

Date: 2014
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DOI: 10.1080/03461238.2011.636969

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