More on Computational Accuracy in Regression
再论回归计算精度
Issue is taken with a previous article which examines Longley's analysis of computation error in regression models. Specifically, the singular value decomposition is used to analyze a set of data which relates to employment levels. This decomposition is used to analyze near multicollinearity in the data. It is suggested that a previous Monte Carlo study of this problem is noninformative, misleading, and possibly irrelevant.