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Suppose that an economic time series is well represented by the model VYt = et - et-1 + 0.5et-2 with o? = 0.4. (a) Given

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Suppose that an economic time series is well represented by the model VYt = et - et-1 + 0.5et-2 with o? = 0.4. (a) Given Y48 = 130, e47 = -0.3, e48 = 0.2, calculate Y48(() for ( = 1, 2, 3. (b) Find the variance of (-step ahead forecast error for ( = 1, 2, 3

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