Autori:
Lee, Sangyeol,
Lin, Liang-Ching,
Chien, Hsiang-LinTitolo:
Symbolic interval-valued data analysis for time series based on auto-interval-regressive modelsPeriodico:
Statistical methods & applications : Journal of the Italian Statistical SocietyAnno:
2021 - Volume:
30 - Fascicolo:
1 - Pagina iniziale:
295 - Pagina finale:
315This study considers interval-valued time series data. To characterize such data, we propose an auto-interval-regressive (AIR) model using the order statistics from normal distributions. Furthermore, to better capture the heteroscedasticity in volatility, we design a heteroscedastic volatility AIR (HVAIR) model. We derive the likelihood functions of the AIR and HVAIR models to obtain the maximum likelihood estimator. Monte Carlo simulations are then conducted to evaluate our methods of estimation and confirm their validity. A real data example from the S&P 500 Index is used to demonstrate our method.
SICI: 1618-2510(2021)30:1<295:SIDAFT>2.0.ZU;2-P
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