差异(会计)
计量经济学
协方差
预测误差的方差分解
已实现方差
基于方差的敏感性分析
动力系数
单因素方差分析
数学
经济
统计
波动性(金融)
会计
标识
DOI:10.1080/14697688.2024.2342896
摘要
In this study, we propose a dynamic partial (co)variance forecasting model (DPCFM) by introducing a dynamic model averaging (DMA) approach into a partial (co)variance forecasting model. The dynamic partial (co)variance forecasting model considers the time-varying property of the model's parameters and optimal threshold combinations used to construct partial (co)variance. Our empirical results suggest that in both variance and covariance cases, the dynamic partial variance forecasting model can generate more accurate forecasts than an individual partial (co)variance forecasting model in both the statistical and economic sense. The superiority of the dynamic partial (co)variance forecasting model is robust to various forecast horizons.
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