Bayesian Multivariate Mixed Poisson Models with Copula-Based Mixture

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<title>Bayesian Multivariate Mixed Poisson Models with Copula-Based Mixture</title>
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<name type="personal" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="MAPA20220005258">
<namePart>Zhang, Pengcheng</namePart>
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<abstract displayLabel="Summary">It is common practice to use multivariate count modeling in actuarial literature when dealing with claim counts from insurance policies with multiple covers. One possible way to construct such a model is to implement copula directly on discrete margins. However, likelihood inference under this construction involves the computation of multidimensional rectangle probabilities, which could be computationally expensive, especially in the elliptical copula case. Another potential approach is based on the multivariate mixed Poisson model. The crucial work under this method is to find an appropriate multivariate continuous distribution for mixing parameters. By virtue of the copula, this issue could be easily addressed. Under such a framework, the Markov chain Monte Carlo (MCMC) method is a feasible strategy for inference. The usefulness of our model is then illustrated through a real-life example. The empirical analysis demonstrates the superiority of adopting a copula-based mixture over other types of mixtures. Finally, we demonstrate how those fitted models can be applied to the insurance ratemaking problem in a Bayesian context </abstract>
<note type="statement of responsibility">Pengcheng Zhang...[et al.]</note>
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<topic>Pólizas</topic>
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<title>North American actuarial journal</title>
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<identifier type="issn">1092-0277</identifier>
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<text>06/09/2023 Tomo 27 Número 3 - 2023 , 20 p.</text>
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