Asymptotic Equivalence of an Expansion Test and an Approximate Degrees of Freedom Test
研究了在线性模型中误差方差不相等但独立估计时，扩展检验与近似自由度检验在方差估计的自由度倒数阶上等价。
An expansion test and an approximate degrees of freedom test of a linear hypothesis in a linear model with unequal but independently estimated error variances are shown to be equivalent to terms of order nj-1, where the nj's are the degrees of freedom of the variance estimators.