求助,各位大侠,我用eviews做3元logit回归,出现了各种N/A,错误如下:
WARNING: Singular covariance - coefficients are not unique
Covariance matrix computed using second derivatives
WARNING: Complete separation detected at estimated parameters (results
may not be valid)
这该怎么解决呢?十分重要,求主意,感谢万分。
附件里eq01是分析结果