Approximations for Standard Errors of Estimators of Fixed and Random Effects in Mixed Linear Models
混合线性模型中固定与随机效应估计标准误的近似
Best linear unbiased estimators of the fixed and random effects of mixed linear models are available when the true values of the variance ratios are known. If the true values are replaced by estimated values, the mean squared errors of the estimators of the fixed and random effects increase in size. The magnitude of this increase is investigated, and a general approximation is proposed. The performance of this approximation is investigated in the context of (a) the…