To infinity and beyond: Efficient computation of ARCH(∞) models

Morten Ørregaard Nielsen*, Antoine L. Noël

*Corresponding author af dette arbejde

Publikation: Working paper/Preprint Working paperForskning

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Abstract

This paper provides an exact algorithm for efficient computation of the time series of conditional variances, and hence the likelihood function, of models that have an ARCH(\infty) representation. This class of models includes, e.g., the fractionally integrated generalized autoregressive conditional heteroskedasticity (FIGARCH) model. Our algorithm is a variation of the fast fractional difference algorithm of Jensen and Nielsen (2014). It takes advantage of the fast Fourier transform (FFT) to achieve an order of magnitude improvement in computational speed. The efficiency of the algorithm allows estimation (and simulation/bootstrapping) of ARCH(\infty) models, even with very large data sets and without the truncation of the filter commonly applied in the literature. In Monte Carlo simulations, we show that the elimination of the truncation of the filter reduces the bias of the quasi-maximum-likelihood estimators and improves out-of-sample forecasting. Our results are illustrated in two empirical examples.
OriginalsprogEngelsk
UdgivelsesstedAarhus
UdgiverInstitut for Økonomi, Aarhus Universitet
Antal sider19
StatusUdgivet - nov. 2020
NavnCREATES Research Paper
Nummer2020-13

Emneord

  • Circular convolution theorem
  • Conditional heteroscedasticity
  • Fast Fourier transform
  • FIGARCH
  • Truncation

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