Dear Statalist,
I am new to xtmixed and I have some problems with the postestimation
command estat vce. For example:
use pig
xtmixed weight week ||id :
estat vce
Covariance matrix of coefficients of xtmixed model | weight | lns1_1_1 | lnsig_e e(V) | week _cons | _cons | _cons -------------+------------------------+------------+------------weight | | | week | .00152594 | | _cons | -.0076297 .36377668 | | -------------+------------------------+------------+------------lns1_1_1 | | | _cons | 0 0 | .01133685 | -------------+------------------------+------------+------------lnsig_e | | | _cons | 0 0 | -.0000421 | .00130548
I don't understand the meaning of the two last right columns.I didn't find
any explanation into the documentation.
Thank you for your help,
Xavier
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