Displaying 1 result from an estimated 1 matches for "weensy".
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teensy
2003 Oct 21
0
lme mildly blowing up
....
What I'm wondering is:
(1) Is the model basically running home to OLS-or-very-close-to-it? If
I estimate the same model using stata's xtreg, it returns a sigma_u
of zero, and if I estimate it with HLM, it generates a bad tau and
tries again with one that is positive but weensy. Are the algorithms
in lme doing the same thing here, or something closely analogous?
Generating an impermissible negative that gets truncated to zero, or
substituting a very small positive number for it, or generating that
very small number directly?
(2) Assuming that the mod...