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On diagnostics in conditionally heteroskedastic time series models under elliptical distributions

Published online by Cambridge University Press:  14 July 2016

Shuangzhe Liu*
Affiliation:
Mathematical Sciences Institute, Australian National University, Canberra ACT 0200, Australia. Email address: lius@maths.anu.edu.au

Abstract

In statistical diagnostics and sensitivity analysis, the local influence method plays an important rôle. In the present paper, we use this method to study financial time series data and conditionally heteroskedastic models under elliptical distributions. We start with a likelihood displacement, and consider data- and model-perturbation schemes. We obtain corresponding matrices of derivatives, and measures of slope and normal curvature, and then discuss the assessment of local influence.

MSC classification

Type
Part 7. Time series analysis
Copyright
Copyright © Applied Probability Trust 2004 

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