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      FIRST-ORDER INTEGER-VALUED AUTOREGRESSIVE (INAR(1)) PROCESS

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      Journal of Time Series Analysis
      Wiley-Blackwell

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          Discrete Analogues of Self-Decomposability and Stability

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            On Conditional Least Squares Estimation for Stochastic Processes

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              First-order autoregressive gamma sequences and point processes

              It is shown that there is an innovation process {∊ n } such that the sequence of random variables { X n } generated by the linear, additive first-order autoregressive scheme X n = p X n-1 + ∊ n are marginally distributed as gamma (λ, k ) variables if 0 ≦ p ≦ 1. This first-order autoregressive gamma sequence is useful for modelling a wide range of observed phenomena. Properties of sums of random variables from this process are studied, as well as Laplace-Stieltjes transforms of adjacent variables and joint moments of variables with different separations. The process is not time-reversible and has a zero-defect which makes parameter estimation straightforward. Other positive-valued variables generated by the first-order autoregressive scheme are studied, as well as extensions of the scheme for generating sequences with given marginal distributions and negative serial correlations.
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                Author and article information

                Journal
                Journal of Time Series Analysis
                J Time Series Analysis
                Wiley-Blackwell
                0143-9782
                1467-9892
                May 1987
                May 1987
                : 8
                : 3
                : 261-275
                Article
                10.1111/j.1467-9892.1987.tb00438.x
                16e95f66-1af3-44c0-98d0-5e7a6873b3cf
                © 1987

                http://doi.wiley.com/10.1002/tdm_license_1.1

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