Giraitis, L. and Robinson, P.M. (2003) Edgeworth expansions for semiparametric Whittle estimation of long memory. Annals of Statistics, 31 (4). pp. 1325-1375. ISSN 0090-5364Full text not available from this repository.
The semiparametric local Whittle or Gaussian estimate of the long memory parameter is known to have especially nice limiting distributional properties, being asymptotically normal with a limiting variance that is completely known. However in moderate samples the normal approximation may not be very good, so we consider a refined, Edgeworth, approximation, for both a tapered estimate, and the original untapered one. For the tapered estimate, our higher-order correction involves two terms, one of order 1/√m (where m is the bandwidth number in the estimation), the other a bias term, which increases in m; depending on the relative magnitude of the terms, one or the other may dominate, or they may balance. For the untapered estimate we obtain an expansion in which, for m increasing fast enough, the correction consists only of a bias term. We discuss applications of our expansions to improved statistical inference and bandwidth choice. We assume Gaussianity, but in other respects our assumptions seem mild.
|Institution:||The University of York|
|Academic Units:||The University of York > Mathematics (York)
The University of York > Economics and Related Studies (York)
|Depositing User:||York RAE Import|
|Date Deposited:||28 Aug 2009 10:43|
|Last Modified:||28 Aug 2009 10:43|
|Publisher:||Institute of Mathematical Statistics|