A skew INAR(1) process on $${\mathbb {Z}}$$ Z

Wagner Barreto-Souza () and Marcelo Bourguignon ()

AStA Advances in Statistical Analysis, 2015, vol. 99, issue 2, 189-208

Abstract: Integer-valued time series models have been a recurrent theme considered in many papers in the last three decades, but only a few of them have dealt with models on $${\mathbb {Z}}$$ Z (that is, including both negative and positive integers). Our aim in this paper is to introduce a first-order, integer-valued autoregressive process on $${\mathbb {Z}}$$ Z with skew discrete Laplace marginals (Kozubowski and Inusah, Ann Inst Stat Math 58:555–571, 2006 ). For this, we define a new operator that acts on two independent latent processes, similarly as made by Freeland (Adv Stat Anal 94:217–229, 2010 ). We derive some joint and conditional basic properties of the proposed process such as characteristic function, moments, higher-order moments and jumps. Estimators for the parameters of our model are proposed and their asymptotic normality is established. We run a Monte Carlo simulation to evaluate the finite-sample performance of these estimators. In order to illustrate the potential for practice of our process we apply it to a real data set about stock market. Copyright Springer-Verlag Berlin Heidelberg 2015

Keywords: Integer-valued time series models; Skew discrete Laplace distribution; Latent process; Thinning operator; Estimation; Asymptotic normality (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (1)

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DOI: 10.1007/s10182-014-0236-2

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