英语语法分析

Non-constant error variance or heteroscedasticity.

非常量误差方差或异方差性。

One kind of heteroscedasticity testing method was proposed through extreme value theory and extreme value index estimator.

应用极值理论，通过极值指数估计量，提出了一种可行的对异方差的检验方法。

This paper deals with the statistical inference of an autoregressive conditional heteroscedasticity (ARCH) model under restriction.

研究序约束条件下自回归条件异方差（ARCH）模型的统计推断。