标准化过后又出现问题:
convergence not achieved
Warning: e(V) matrix is not positive definite.
Spatial effects Std. Err. will be computed using a modified
positive definite matrix (Rebonato and Jackel, 2000).
Computing marginal effects standard errors using MC simulation...
estimates post: matrix has missing values
请问各位大神这是啥情况吖?而且是用的子样本(权重矩阵也是子矩阵)回归,全样本不用标准化就能出结果,这咋这样呢?