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arXiv 2011.04577econ.EMstat.AP
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稀疏时变参数向量误差修正模型及其在电价建模中的应用

Sparse time-varying parameter VECMs with an application to modeling electricity prices

Niko Hauzenberger, Michael Pfarrhofer, Luca Rossini

AI总结:

本文提出稀疏时变参数向量误差修正模型,结合全局-局部先验与辅助损失函数后处理实现自动稀疏建模,并在欧洲电价预测中验证了其有效性。

摘要:

本文提出了一种具有异方差扰动的时变参数(TVP)向量误差修正模型(VECM)。我们提出了以自动化方式进行动态模型设定的工具。这涉及使用全局-局部先验,并对参数进行后处理以获得真正稀疏的解。根据相应的系数集合,我们通过最小化辅助损失函数来实现这一目标。我们的两步方法限制了过拟合并降低了参数估计的不确定性。我们将该框架应用于欧洲电价建模。当联合考虑不同市场的每日电价时,我们的模型突显了明确处理协整和非线性的重要性。在一项针对德国小时电价的预测练习中,我们的方法产生了具有竞争力的预测精度指标。

英文摘要:

In this paper we propose a time-varying parameter (TVP) vector error correction model (VECM) with heteroskedastic disturbances. We propose tools to carry out dynamic model specification in an automatic fashion. This involves using global-local priors, and postprocessing the parameters to achieve truly sparse solutions. Depending on the respective set of coefficients, we achieve this via minimizing auxiliary loss functions. Our two-step approach limits overfitting and reduces parameter estimation uncertainty. We apply this framework to modeling European electricity prices. When considering daily electricity prices for different markets jointly, our model highlights the importance of explicitly addressing cointegration and nonlinearities. In a forecast exercise focusing on hourly prices for Germany, our approach yields competitive metrics of predictive accuracy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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