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Difference Equations for the Higher‐Order Moments and Cumulants of the INAR(1) Model

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  • Maria Eduarda Da Silva
  • Vera Lúcia Oliveira

Abstract

Recently, as a result of the growing interest in modelling stationary processes with discrete marginal distributions, several models for integer value time series have been proposed in the literature. One of these models is the INteger‐AutoRegressive (INAR) model. Here we consider the higher‐order moments and cumulants of the INAR(1) process and show that they satisfy a set of Yule–Walker type difference equations. We also obtain the spectral and bispectral density functions, thus characterizing the INAR(1) process in the frequency domain. We use a frequency domain approach, namely the Whittle criterion, to estimate the parameters of the model. The estimation theory and associated asymptotic theory of this estimation method are illustrated numerically.

Suggested Citation

  • Maria Eduarda Da Silva & Vera Lúcia Oliveira, 2004. "Difference Equations for the Higher‐Order Moments and Cumulants of the INAR(1) Model," Journal of Time Series Analysis, Wiley Blackwell, vol. 25(3), pages 317-333, May.
    • Handle: RePEc:bla:jtsera:v:25:y:2004:i:3:p:317-333
    DOI: 10.1111/j.1467-9892.2004.01685.x
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    References listed on IDEAS

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    1. Rice, John, 1979. "On the estimation of the parameters of a power spectrum," Journal of Multivariate Analysis, Elsevier, vol. 9(3), pages 378-392, September.
    2. P. A. Jacobs & P. A. W. Lewis, 1983. "Stationary Discrete Autoregressive‐Moving Average Time Series Generated By Mixtures," Journal of Time Series Analysis, Wiley Blackwell, vol. 4(1), pages 19-36, January.
    3. M. A. Al‐Osh & A. A. Alzaid, 1987. "First‐Order Integer‐Valued Autoregressive (Inar(1)) Process," Journal of Time Series Analysis, Wiley Blackwell, vol. 8(3), pages 261-275, May.
    4. S. A. O. Sesay & T. Subba Rao, 1992. "Frequency‐Domain Estimation Of Bilinear Time Series Models," Journal of Time Series Analysis, Wiley Blackwell, vol. 13(6), pages 521-545, November.
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    Cited by:

    1. Christian H. Weiß, 2012. "Fully observed INAR(1) processes," Journal of Applied Statistics, Taylor & Francis Journals, vol. 39(3), pages 581-598, July.

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