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Whittle pseudo-maximum likelihood estimation for nonstationary time series

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Whittle pseudo-maximum likelihood estimates of parameters for stationary time series have been found to be consistent and asumptotically normal in the presence of long-range dependence. Generalizing the definition of the memory parameter d, we extend these results to include possibly nonstationary (0.5 d < 1) or antipersistent (-0.5 < d < 0) observations. Using adequate data tapers we can apply this estimation technique to any degree of nonstationarity We analyse the performance of the estimates on simulated and real data.

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en

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application/pdf

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http://eprints.lse.ac.uk/2273/1/Whittle_Pseudo-Maximum_Likelihood_Estimation_for_Nonstationary_Time_Series.pdf

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