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st: estimation units for gllamm random coefficients
From
"Bontempo, Daniel E" <[email protected]>
To
<[email protected]>
Subject
st: estimation units for gllamm random coefficients
Date
Tue, 18 May 2010 14:45:43 -0500
Hi all -
I can see form the output below that the modeled units of the level-1
residual is log standard deviation, and if I exponentiate it and square
it, I get the value in the output. But this does not seem to work for
the level-2 variance. Is it in a different unit?
gllamm model
log likelihood = -998.21604
------------------------------------------------------------------------
------
mDx | Coef. Std. Err. z P>|z| [95% Conf.
Interval]
-------------+----------------------------------------------------------
------
dualCond | 7.296223 .9465117 7.71 0.000 5.441094
9.151352
ageGrp | 2.188459 1.317523 1.66 0.097 -.3938394
4.770757
x_cond_age | 9.415988 1.385551 6.80 0.000 6.700357
12.13162
_cons | 9.217251 .9020915 10.22 0.000 7.449184
10.98532
------------------------------------------------------------------------
------
Variance at level 1
------------------------------------------------------------------------
------
35.835373 (3.3563895)
Variances and covariances of random effects
------------------------------------------------------------------------
------
***level 2 (subjID)
var(1): 14.268077 (3.7821848)
------------------------------------------------------------------------
------
. mat list e(b)
e(b)[1,6]
mDx: mDx: mDx: mDx: lns1:
subj1:
dualCond ageGrp x_cond_age _cons _cons
_cons
y1 7.2962233 2.1884589 9.4159876 9.2172507 1.7894677
3.7773108
. display exp( 1.7894677 )^2
35.83537
Thanks,-Daniel
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