A GARMA Framework for Unit-Bounded Time Series Based on the Unit-Lindley Distribution with Application to Renewable Energy Data
基于单位 Lindley 分布的单位区间时间序列 GARMA 框架及可再生能源应用AI 解读 ↓
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基于单位 Lindley 分布的单位区间时间序列 GARMA 框架及可再生能源应用AI 解读 ↓
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The Unit-Lindley is a one-parameter family of distributions in $(0,1)$ obtained from an appropriate transformation of the Lindley distribution. In this work, we introduce a class of dynamical time series models for continuous random variables taking values in $(0,1)$ based on the Unit-Lindley distribution. The models pertaining to the proposed class are observation-driven ones for which, conditionally on a set of covariates, the random component is modeled by a Unit-Lindley distribution. The systematic component aims at modeling the conditional mean through a dynamical structure resembling the classical ARMA models. Parameter estimation in conducted using partial maximum likelihood, for which an asymptotic theory is available. Based on asymptotic results, the construction of confidence intervals, hypotheses testing, model selection, and forecasting can be carried on. A Monte Carlo simulation study is conducted to assess the finite sample performance of the proposed partial maximum likelihood approach. Finally, an application considering forecasting of the proportion of net electricity generated by conventional hydroelectric power in the United States is presented. The application show the versatility of the proposed method compared to other benchmarks models in the literature.