3) Rewrite the following models in terms of backshift operator. (a) An MA(1) model (b) An MA(2) model (c) An AR(1) model (d) Yt+1 = 0.23Yt - 0.15Yt-1 + ?t+1 (e) An ARMA(1,1) model
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(1) MA(1) model: The general form of an MA(1) model is given by: $$Y_t = c + \epsilon_t + \theta_1 \epsilon_{t-1}$$ In terms of the backshift operator, we can write it as: $$Y_t = c + (1 + \theta_1 B) \epsilon_t$$ (2) MA(2) model: The general form of an MA(2) Show more…
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