an:00843006
Zbl 0838.62085
Robinson, P. M.
Log-periodogram regression of time series with long range dependence
EN
Ann. Stat. 23, No. 3, 1048-1072 (1995).
00028639
1995
j
62M10 62E20 62G05 62G20
long range dependence; least squares; generalized least squares; multiple time series models; spectral density matrix; log-periodogram regression estimate; differencing parameters; asymptotic normality
Summary: This paper discusses the estimation of multiple time series models which allow elements of the spectral density matrix to tend to infinity or zero at zero frequency and be unrestricted elsewhere. A form of log-periodogram regression estimate of differencing and scale parameters is proposed, which can provide modest efficiency improvements over a previously proposed method (for which no satisfactory theoretical justification seems previously available) and further improvements in a multivariate context when differencing parameters are a priori equal. Assuming Gaussianity and additional conditions which seem mild, asymptotic normality of the parameter estimates is established.