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Geometric dispersion models with real quadratic v-functions

机译:具有实际二次V函数的几何分散模型

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摘要

Geometric dispersion models, characterized by their v-functions, are recently introduced arising from geometric sums of exponential dispersion models and they exhibit many potential applications. In this paper, we classify all the real quadratic v-functions. Up to affinity, there are only six types of such models with unbounded domain: asymmetric Laplace, geometric and the four remaining ones are obtained by the exponential mixtures of Poisson, gamma, negative binomial and generalized hyperbolic secant distributions. Further, we find the seventh one which is geometric hybrid distribution, purely a quadratic v-function on bounded domain and, classically steep as well as unbounded ones but not geometric-steep. (C) 2018 Elsevier B.V. All rights reserved.
机译:几何分散模型,其特征在于它们的V函数,最近引入了来自指数色散模型的几何和,并且它们表现出许多潜在的应用。 在本文中,我们分类所有真正的二次V函数。 具有亲和力,只有六种类型的这种型号,具有无界域:不对称的LAPLACE,几何和四个剩余的型号由泊松,伽玛,负二项式和广义双曲线分布的指数混合物获得。 此外,我们找到了一个是几何混合分布的第七个,纯粹是有界域上的二次V函数,并经典地陡峭,并且不受约束但不是几何陡峭。 (c)2018 Elsevier B.v.保留所有权利。

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