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arXiv 2201.01793stat.MEstat.ML
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面板数据组结构估计中利用方差信息的谱聚类

Spectral Clustering with Variance Information for Group Structure Estimation in Panel Data

Lu Yu, Jiaying Gu, Stanislav Volgushev

AI总结:

针对面板数据中未知分组估计问题,提出利用个体系数估计方差信息的谱聚类方法,计算高效且适用于个体数据缺失场景,模拟和实证均优于现有方法。

摘要:

考虑一个面板数据设定,其中可获得对个体的重复观测。通常可以合理假设存在若干组个体,它们对观测特征具有相似的影响效应,但分组通常在事先是未知的。我们首先进行局部分析,揭示个体系数估计的方差包含用于估计组结构的有用信息。然后,我们提出一种方法,用于估计一般面板数据模型中未观测的分组,该方法明确考虑了方差信息。我们提出的方法在个体数量大和/或每个个体的重复测量次数多的情况下仍保持计算可行性。所发展的思想甚至可以在个体层面数据不可用、仅向研究者提供参数估计以及估计不确定性的一些量化时应用。一项彻底的模拟研究表明,我们的方法优于现有方法,并且我们将该方法应用于两个实证应用。

英文摘要:

Consider a panel data setting where repeated observations on individuals are available. Often it is reasonable to assume that there exist groups of individuals that share similar effects of observed characteristics, but the grouping is typically unknown in advance. We first conduct a local analysis which reveals that the variances of the individual coefficient estimates contain useful information for the estimation of group structure. We then propose a method to estimate unobserved groupings for general panel data models that explicitly account for the variance information. Our proposed method remains computationally feasible with a large number of individuals and/or repeated measurements on each individual. The developed ideas can also be applied even when individual-level data are not available and only parameter estimates together with some quantification of estimation uncertainty are given to the researcher. A thorough simulation study demonstrates superior performance of our method than existing methods and we apply the method to two empirical applications.

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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