arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1503.04407stat.MEphysics.soc-ph
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最小二乘回归残差检验的空间自相关方法

Spatial autocorrelation approaches to testing residuals from least squares regression

Yanguang Chen

摘要:

在统计学中,Durbin-Watson检验常用于检测最小二乘回归分析中残差序列相关性的存在。然而,Durbin-Watson统计量仅适用于有序时间或空间序列。如果变量包括来自空间随机抽样的横截面数据,则Durbin-Watson统计量将无效,因为Durbin-Watson统计量的值取决于数据点排列的顺序。基于空间自相关的思想,本文提出了两种新的检验基于空间样本的最小二乘回归残差序列相关性的统计量。通过类比新形式的莫兰指数,自相关系数被定义为标准化的残差向量和归一化的空间权重矩阵。然后,类比的Durbin-Watson统计量,序列相关指数的构造。作为案例,将这两个统计量应用于中国29个地区的空间样本。这些结果表明,新的空间自相关模型可以用来检验回归分析残差的序列相关性。在实际应用中,新的统计量可以弥补Durbin-Watson检验的不足。

英文摘要:

In statistics, the Durbin-Watson test is always employed to detect the presence of serial correlation of residuals from a least squares regression analysis. However, the Durbin-Watson statistic is only suitable for ordered time or spatial series. If the variables comprise cross-sectional data coming from spatial random sampling, the Durbin-Watson will be ineffectual because the value of Durbin-Watson's statistic depends on the sequences of data point arrangement. Based on the ideas from spatial autocorrelation, this paper presents two new statistics for testing serial correlation of residuals from least squares regression based on spatial samples. By analogy with the new form of Moran's index, an autocorrelation coefficient is defined with a standardized residual vector and a normalized spatial weight matrix. Then on the analogy of the Durbin-Watson statistic, a serial correlation index is constructed. As a case, the two statistics are applied to the spatial sample of 29 China's regions. These results show that the new spatial autocorrelation model can be used to test the serial correlation of residuals from regression analysis. In practice, the new statistics can make up for the deficiency of the Durbin-Watson test.

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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