In this paper, we portray the essential features of the finite-sample signal extraction problem in both the stationary and the nonstationary cases. The computational procedures can be simplified in the light of our analysis. An important outcome of the analysis is a demonstration that the start-up problem can be handled far more easily that one might expect from a passing acquaintance with the usual practices.
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Paper provided by Queen Mary, University of London, Department of Economics in its series Working Papers with number
433.