Derivation of the Explicit Formula for the l-step Ahead Forecast \( \hat{Z}_t(l) \) for a Stationary AR(1) Model
Students often confuse with a general forecast. The main pitfall in derivation is incorrect index management during recursive unrolling, leading to errors in the geometric series bounds or the final power of multiplying . Careful handling of vs. is key.
Institutional Reference: Time Series Analysis
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