An Alternative to Eisenhart's Model II and Mixed Model in the Case of Negative Variance Estimates
针对方差成分估计为负的问题，提出将某些参数视为协方差而非方差的替代模型，并给出估计和假设检验的分布结果。
Abstract An alternative model useful for addressing the problem of negative variance component estimators is proposed. Specifically, it is possible to view certain of the parameters as covariances rather than as variances. Thus, the problems of the negative variance component estimator may be resolved by using a different model. Distributional results relating to both estimation and tests of hypotheses are also given. Key Words: Variance componentNegative estimator of a variance componentEisenhart Model IIMixed model