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We discuss specification, frequency domain estimation and application of flexible fractionally integrated seasonal long memory time series models, which allow for 'chi-squared' (seasonal) unit root testing. We suggest periodogram regression and approximate ML estimation. We successfully apply a...
Persistent link: https://www.econbiz.de/10004972223
-Theory- Two theories about trends in left-right political orientations are juxtaposed: the persistence theory claiming that left-right orientations are highly resistant to change versus the irrelevance theory anticipating a move of mass publics towards the center of the left-right continuum....
Persistent link: https://www.econbiz.de/10004972274
Two important empirical features of monthly US unemployment are that shocks to the series seem rather persistent and that unemployment seems to rise faster in recessions than that it falls during expansions. To jointly capture these features of long memory and nonlinearity, respectively, we put...
Persistent link: https://www.econbiz.de/10005505011
, coffee, cotton, orange juice, Kansas City wheat, rubber, and palm oil. The class of fractional GARCH models, namely the … FIGARCH model of Baillie et al. (1996), FIEGACH model of Bollerslev and Mikkelsen (1996), and FIAPARCH model of Tse (1998 …), are modelled and compared with the GARCH model of Bollerslev (1986), EGARCH model of Nelson (1991), and APARCH model of …
Persistent link: https://www.econbiz.de/10008570627
Time series data affect many aspects of our lives. This paper highlights ten things we should all know about time series, namely: a good working knowledge of econometrics and statistics, an awareness of measurement errors, testing for zero frequency, seasonal and periodic unit roots, analysing...
Persistent link: https://www.econbiz.de/10008484072
Using unobservable conditional variance as measure, latentvariable approaches, such as GARCH and stochasticvolatility …
Persistent link: https://www.econbiz.de/10010986437
Both unconditional mixed-normal distributions and GARCH models with fat-tailed conditional distributions have been … employed for modeling financial return data. We consider a mixed-normal distribution coupled with a GARCH-type structure which …
Persistent link: https://www.econbiz.de/10010958539
, such as GARCH models, are investigated, to determine if they are more appropriate for predicting future return volatility …
Persistent link: https://www.econbiz.de/10010958558
While much of classical statistical analysis is based on Gaussian distributional assumptions, statistical modeling with the Laplace distribution has gained importance in many applied fields. This phenomenon is rooted in the fact that, like the Gaussian, the Laplace distribution has many...
Persistent link: https://www.econbiz.de/10010958588
) forecasting ability of the normal-GARCH model. Compared to the use of more sophisticated GARCH models, the new method is fast …
Persistent link: https://www.econbiz.de/10010958670