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Stationarity and Memory of ARCH Models [PDF]

open access: yes, 2000
Sufficient conditions for strict stationarity of ARCH(8) are established, without imposing covariance stationarity and for any specification of the conditional second moment coefficients.
Paolo Zaffaroni
core   +2 more sources

Comparative Study of Lee Carter and Arch Model in Modelling Female Mortality in Nigeria

open access: yesUMYU Scientifica Journal, 2022
Using Nigeria mortality data from 2009 to 2020, this study compares and contrasts how well the Lee-Carter and ARCH models performed. Singular value decomposition (SVD) method, Langrage multiplier test, and autoregressive conditional heteroskedasticity ...
Aliyu Umar Shelleng   +3 more
doaj   +1 more source

Symmetric and asymmetric volatility: Forecasting the Borsa Istanbul 100 index return volatility

open access: yesFinancial Internet Quarterly, 2023
The development of technology and the globalization of financial markets have increased the volatility in financial markets and caused the emergence of risks and uncertainties that have not been previously encountered.
Öner Selma, Öner Hakan
doaj   +1 more source

Multivariate rotated ARCH models [PDF]

open access: yesJournal of Econometrics, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Noureldin, Diaa   +2 more
openaire   +7 more sources

ARCHModels.jl: Estimating ARCH Models in Julia

open access: yesJournal of Statistical Software, 2023
This paper introduces ARCHModels.jl, a package for the Julia programming language that implements a number of univariate and multivariate autoregressive conditional heteroskedasticity models.
Simon A. Broda, Marc S. Paolella
doaj   +1 more source

WHITTLE ESTIMATION OF ARCH MODELS [PDF]

open access: yesEconometric Theory, 2001
Summary: For a class of parametric ARCH models, Whittle estimation based on squared observations is shown to be \(\sqrt n\)-consistent and asymptotically normal. Our conditions require the squares to have short memory autocorrelation, by comparison with the work of \textit{P. Zaffaroni} and \textit{B. d'Italia} [J. Econom. 115, 199--258 (2003; Zbl 1027.
Liudas Giraitis, Peter M. Robinson
openaire   +5 more sources

Ramanujan’s Equation as an Aid to Predict Arch Perimeter Changes with Precision: A Retrospective Study

open access: yesJournal of Indian Orthodontic Society, 2023
Introduction The aim of this study was to evaluate the validity of Ramanujan’s equation in measuring arch perimeter on untreated natural dentition models and their orthodontically corrected posttreatment models.
Kishan Antala   +3 more
doaj   +1 more source

Robust tests for ARCH in the presence of a misspecified conditional mean: A comparison of nonparametric approaches

open access: yesCogent Economics & Finance, 2021
This study compares the size and power of autoregressive conditional heteroskedasticity (ARCH) tests that are robust to the presence of a misspecified conditional mean.
Daiki Maki, Yasushi Ota
doaj   +1 more source

A FUNCTIONAL VERSION OF THE ARCH MODEL [PDF]

open access: yesEconometric Theory, 2012
Improvements in data acquisition and processing techniques have led to an almost continuous flow of information for financial data. High-resolution tick data are available and can be quite conveniently described by a continuous-time process. It is therefore natural to ask for possible extensions of financial time series models to a functional setup. In
Hörmann, Siegfried   +2 more
openaire   +4 more sources

Finite Element Analysis of Orthodontic Relapse in Different Maxillary Arch Form

open access: yesBIO Integration, 2021
Background: Orthodontic relapse is fairly common; however, the mechanisms between relapse and the dental arch form remain unclear. The purpose of our study was to establish three-dimensional (3D) finite element models of different dental arch forms after
Yuanyuan Li, MD   +5 more
doaj   +1 more source

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