Stationary time series models with exponential dispersion model margins

被引:29
作者
Jorgensen, B
Song, PXK
机构
[1] Univ British Columbia, Dept Stat, Vancouver, BC V6T 1Z2, Canada
[2] York Univ, Dept Math & Stat, N York, ON M3J 1P3, Canada
关键词
autoregressive process; convolution-closed family; infinite divisibility; moving average process of infinite order; non-normal time series; saddlepoint approximation; small-dispersion asymptotics; thinning;
D O I
10.1017/S0021900200014698
中图分类号
O21 [概率论与数理统计]; C8 [统计学];
学科分类号
020208 ; 070103 ; 0714 ;
摘要
We consider a class of stationary infinite-order moving average processes with margins in the class of infinitely divisible exponential dispersion models. The processes are constructed by means of the thinning operation of Joe (1996), generalizing the binomial thinning used by McKenzie (1986, 1988) and Al-Osh and Alzaid (1987) for integer-valued time series. As a special case we obtain a class of autoregressive moving average processes that an different from the ARMA models proposed by Joe (1996). The range of possible marginal distributions for the new models is extensive and includes all infinitely divisible distributions with finite moment generating functions, hereunder many known discrete, continuous and mixed distributions.
引用
收藏
页码:78 / 92
页数:15
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