Please talk to the package maintainer whi may not be listen on R-help.
Best,
Uwe Ligges
On 25.12.2017 10:53, Ye Dong wrote:
Dear Sir,
I am using the package pgmm you build in panel regression. However, I found
that when T is 10, N=30, the error would show as following:
system is computationally singular: reciprocal condition number
But the similar code works well on Stata, so I wonder how I can optimize the
algorithm, for example , the inverse matrix optimization ? And I have checked
my data as well, no multicollinearity problem exists. Another problem is that
although I have some NA in the panel data, the panel dataframe is still
recognized as balanced model. But with plm, the dataframe would be recognized
unbalanced.
Thanks and Best regards,
Ye Dong
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