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A define the components which make up an arima model 20 b

a) Define the components, which make up an ARIMA model. (20%)

b) Why is Wolds decomposition fundamental to time series modelling?

c) Outline the Box-Jenkins identification methodology.

d) Define the exponentially weighted moving average time series forecasting approach and give examples of commonly used versions of this model.

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Econometrics: A define the components which make up an arima model 20 b

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