Lag selection in unit root tests: a literature review
DOI:
https://doi.org/10.5585/exactaep.2022.22061Keywords:
unit root, lag selection, electricity demand, stationarityAbstract
The econometric analysis may be one of the most common ways to model and forecast different time series problems, such as the electricity demand. In this type of analysis, the presence of unit root may lead to unreliable forecasts. Hence, the correct identification of the presence of unit root on the series to be modeled is essential. In order to perform this task, unit root tests, such as ADF, can be applied. One of key steps in this test procedure is to properly select the number of lags to be used. In this paper, we present in both quantitative and qualitative ways, that research on this subject is in expansion and there is no consensus on how to select the number of lags to be applied in the test. Therefore, it is evident that this is a subject in which further research is needed.
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Copyright (c) 2022 Anderson Garcia Silveira, Viviane Leite Dias de Mattos, Luiz Ricardo Nakamura, Mariane Coelho Amaral, Andrea Cristina Konrath
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