Estimation of von Liebig Response Functions
提出两种估计冯·李比希响应函数的方法：一种结合普通最小二乘和自助法，另一种用最大似然估计。实验数据验证了方法的一致性，且残差正态性检验支持最大似然法。
Abstract Two distinct but related approaches for the estimation of von Liebig response functions are presented. The first approach is based upon a two‐phase, ordinary least squares procedure combined with bootstrapping for computing the standard errors of the estimates. The second approach generates maximum likelihood estimates of the parameters and can be implemented according to two different parameterizations of the model. Application of the procedures to a sample of experimental data suggests a satisfactory degree of conformity of the results. A test of normality of the disturbance term based upon the estimated residuals failed to reject the null hypothesis, further supporting the maximum likelihood approach.