xsmle c pop pop_sq sp sp_sq dv cons gdp inn,wmat(W) model(sdm) fe nolog robust
如果用effects就会报错,如果用noeffects就没问问题。但是直接效应和间接效应的结果对我很重要。
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).
estimates post: matrix has missing values
r(504);
说矩阵有缺失值,但我检查过矩阵并没有缺失值,请问怎么解决?