Dear Shige Song,
gllapred is for prediction and gllasim for simulation.
gllasim simulates responses and/or latent variables
from the model using pseudorandom numbers (giving
different results each time, unless you set the
random number seed). This can be used to generate
data from a model, for instance to check how close
the estimates for the simulated data are to the truth.
gllapred predicts responses/and or latent variables
(giving the same result each time). Loosely speaking,
a prediction is a 'best guess' of the realization
of a random variable, based on the model and (other)
data.
See http://www.gllamm.org for information on these
commands.
Best wishes,
Sophia
At 11:03 PM 10/9/2003 -0700, you wrote:
>Dear All,
>
>I am using GLLAMM to do a two-level logisgic model and how tring to plot
>some predicted values using gllapred. I realized there is another progrmam
>called "gllasim", which looks quite similar to what gllapred. Can anyone
>provide more details on what these two commands are designed for and how
>to choose between them? Thanks!
>
>Shige Song
>Department of Sociology, UCLA
>
>*
>* For searches and help try:
>* http://www.stata.com/support/faqs/res/findit.html
>* http://www.stata.com/support/statalist/faq
>* http://www.ats.ucla.edu/stat/stata/
>
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
