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A New Overdispersed Integer-Valued Moving Average Model with Dependent Counting Series
1School of Statistics, Southwestern University of Finance and Economics, Chengdu 611130, China.
Abstract:
A new integer-valued moving average model is introduced. The assumption of independent counting series in the model is relaxed to allow dependence between them, leading to the overdispersion in the model. Statistical properties were established for this new integer-valued moving average model with dependent counting series. The Yule-Walker method was applied to estimate the model parameters. The estimator's performance was evaluated using simulations, and the overdispersion test of the INMA(1) process was applied to examine the dependence between counting series.
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