ArticleAdvances in difference equations2021
Fractional unit-root tests allowing for a fractional frequency flexible Fourier form trend: predictability of Covid-19.
Article in Advances in difference equations, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Predictive dynamical modeling and stability of the equilibria in a discrete fractional difference COVID-19 epidemic model.Results in physics · 2023Article
- Galectin-3 binding protein stimulated IL-6 expression is impeded by antibody intervention in SARS-CoV-2 susceptible cell lines.Scientific reports · 2022Article
- Multiscaled causality of infections on viral testing volumes: The case of COVID-19 in Tunisia.The International journal of health planning and management · 2022Article
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2 authors.
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Abstract
In this study we propose a fractional frequency flexible Fourier form fractionally integrated ADF unit-root test, which combines the fractional integration and nonlinear trend as a form of the Fourier function. We provide the asymptotics of the newly proposed test and investigate its small-sample properties. Moreover, we show the best estimators for both fractional frequency and fractional difference operator for our newly proposed test. Finally, an empirical study demonstrates that not considering the structural break and fractional integration simultaneously in the testing process may lead to misleading results about the stochastic behavior of the Covid-19 pandemic.
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