Tempered stable autoregressive models

Niharika Bhootna and Arun Kumar

Communications in Statistics - Theory and Methods, 2024, vol. 53, issue 2, 765-785

Abstract: In this article, we introduce and study a one sided tempered stable first order autoregressive model called TAR(1). Under the assumption of stationarity of the model, the marginal probability density function of the error term is found. It is shown that the distribution of the error term is infinitely divisible. Parameter estimation of the introduced TAR(1) process is done by adopting the conditional least square and method of moments based approach and the performance of the proposed methods are evaluated on simulated data. Also, we study an autoregressive model of order one with tempered stable innovations. Using appropriate test statistic it is shown that the model fits very well on real and simulated data. Our models generalize the inverse Gaussian and one-sided stable autoregressive models existing in the literature.

Date: 2024
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DOI: 10.1080/03610926.2022.2092145

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