结构方程系数矩阵线性约束下的完全信息极大似然估计法。
The first is the full information maximum likelihood method with linear constraint of coefficient matrixes in structure equation.
当误差为正态分布时，与和极大似然估计完全一致，具有一致性和最小估值偏差。
They are consistent with the Sum Maximum Likelihood Estimate and have consistence and minimum bias.
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