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arXiv 2301.09671stat.MEcs.LGstat.ML
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时间序列的灵活条件密度估计

Flexible conditional density estimation for time series

New York University(纽约大学);Universidade Federal de São Carlos(圣卡洛斯联邦大学);Universidade de São Paulo(圣保罗大学)

Gustavo Grivol, Rafael Izbicki, Alex A. Okuno, Rafael B. Stern

摘要:

介绍了一种新的时间序列条件密度估计器FlexCodeTS。FlexCodeTS是一个灵活的非参数条件密度估计器,可以基于任意回归方法。结果表明,FlexCodeTS继承了所选回归方法的收敛速度。因此,FlexCodeTS可以通过采用最适合数据结构的回归方法来适应其收敛性。从实证的角度来看,FlexCodeTS在模拟和真实数据中与NNKCDE和Gestival进行了比较。FlexCodeTS被示出为根据CDE损失或弹球损失在所选择的方法中通常获得最佳性能。

英文摘要:

This paper introduces FlexCodeTS, a new conditional density estimator for time series. FlexCodeTS is a flexible nonparametric conditional density estimator, which can be based on an arbitrary regression method. It is shown that FlexCodeTS inherits the rate of convergence of the chosen regression method. Hence, FlexCodeTS can adapt its convergence by employing the regression method that best fits the structure of data. From an empirical perspective, FlexCodeTS is compared to NNKCDE and GARCH in both simulated and real data. FlexCodeTS is shown to generally obtain the best performance among the selected methods according to either the CDE loss or the pinball loss.

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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