Dear All,
I am running some xtreg, fe estimates of the following form
xi: xtreg depvar indepvars i.A*i.B, fe robust cluster(clustervar)
I keep on getting the following error
matrix not positive definite
r(506)
However, the error does not arrise if I do not use the robust command.
I would greatly appreciate if someone may be able to guide me to what
i'm doing wrong. Thank you.
Scott
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Scott Andrew Imberman
Ph.D. Candidate in Economics
University of Maryland
3105 Tydings Hall
College Park, MD 20742
Voice: (301) 405-3493
Fax: (301) 405-3542
[email protected]
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