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• W3023498977 abstract "To predict time series of counts with small values and remarkable fluctuations, an available model is the $r$ states random environment process based on the negative binomial thinning operator and the geometric marginal. However, we argue that the aforementioned model may suffer from the following two drawbacks. First, under the condition of no prior information, the overdispersed property of the geometric distribution may cause the predictions fluctuate greatly. Second, because of the constraints on the model parameters, some estimated parameters are close to zero in real-data examples, which may not objectively reveal the correlation relationship. For the first drawback, an $r$ states random environment process based on the binomial thinning operator and the Poisson marginal is introduced. For the second drawback, we propose a generalized $r$ states random environment integer-valued autoregressive model based on the binomial thinning operator to model fluctuations of data. Yule–Walker and conditional maximum likelihood estimates are considered and their performances are assessed via simulation studies. Two real-data sets are conducted to illustrate the better performances of the proposed models compared with some existing models." @default.
• W3023498977 created "2020-05-13" @default.
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• W3023498977 date "2020-05-01" @default.
• W3023498977 modified "2023-10-01" @default.
• W3023498977 title "Random environment binomial thinning integer-valued autoregressive process with Poisson or geometric marginal" @default.
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• W3023498977 doi "https://doi.org/10.1214/18-bjps421" @default.
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