在双幂变换下,使用极大似然估计方法估计正态线性回归模型中的变换参数,并研究其存在唯一性。根据极大似然函数性质可知,0是其无条件驻点。模拟研究表明,极大似然估计的取值满足存在唯一性,但模型中抽样的随机性会影响其取值是否为无条件驻点0。%Under dual power transformation, the maximum likelihood estimation is used to estimate the parameters in normal linear re-gression model and then study the existence of uniqueness for the parameters. According to the properties of maximum likelihood function, 0 is the unconditional stationary point. The simulation study shows that the existence of uniqueness of the value of maximum likelihood estimate is satisfied. However, the randomly sampling in model may affect whether the value is unconditional stationary point.
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