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arXiv 1811.02809stat.AP
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一种灵活的多数据类型混合协变量空间自回归建模框架

A Flexible Spatial Autoregressive Modelling Framework for Mixed Covariates of Multiple Data Types

Huiwen Wang, Tingting Huang, Shanshan Wang

摘要:

具有数值协变量的混合空间自回归(SAR)模型已经得到了很好的研究。然而,由于非数值数据,如功能数据和成分数据,收到大量的关注,并应用于经济学,医学和气象学,它成为必要的开发灵活的SAR模型与多种数据类型。在这篇文章中,我们整合了三种类型的协变量,功能,成分和数值,在SAR模型。新模型具有经典函数线性模型和标量响应组合线性模型的优点。在此基础上,提出了一种基于函数主成分分析(FPCA)、等距对数变换(ilr)和极大似然估计的模型估计方法。蒙特卡罗实验验证了估计量的有效性。一个真实的数据集也被用来说明所提出的模型的实用性。

英文摘要:

Mixed spatial autoregressive (SAR) models with numerical covariates have been well studied. However, as non-numerical data, such as functional data and compositional data, receive substantial amounts of attention and are applied to economics, medicine and meteorology, it becomes necessary to develop flexible SAR models with multiple data types. In this article, we integrate three types of covariates, functional, compositional and numerical, in an SAR model. The new model has the merits of classical functional linear models and compositional linear models with scalar responses. Moreover, we develop an estimation method for the proposed model, which is based on functional principal component analysis (FPCA), the isometric logratio (ilr) transformation and the maximum likelihood estimation method. Monte Carlo experiments demonstrate the effectiveness of the estimators. A real dataset is also used to illustrate the utility of the proposed model.

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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