Unconditional distributions obtained from conditional specification models with applications in risk theory

E. Gómez-Déniz and E. Calderín-Ojeda

Scandinavian Actuarial Journal, 2014, vol. 2014, issue 7, 602-619

Abstract: Bivariate distributions, specified in terms of their conditional distributions, provide a powerful tool to obtain flexible distributions. These distributions play an important role in specifying the conjugate prior in certain multi-parameter Bayesian settings. In this paper, the conditional specification technique is applied to look for more flexible distributions than the traditional ones used in the actuarial literature, as the Poisson, negative binomial and others. The new specification draws inferences about parameters of interest in problems appearing in actuarial statistics. Two unconditional (discrete) distributions obtained are studied and used in the collective risk model to compute the right-tail probability of the aggregate claim size distribution. Comparisons with the compound Poisson and compound negative binomial are made.

Date: 2014
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DOI: 10.1080/03461238.2012.751674

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