Use DEFINE in Monte Carlo simulation PreviousNext
Mplus Discussion > Multilevel Data/Complex Sample >
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 Zachary Chang posted on Thursday, December 27, 2007 - 1:57 pm
Hi,
I am wondering if the DEFINE function can be used in Monte Carlo data generation procedure. I know that when I read external data, I could use DEFINE to have a interaction term. But in the step where simulated data sets are generated, can I use define function?

In particular, my model is

Yij = b0j + b1j*Xij + rij
b0j = r00 + r01*Wj + r02*Gj + r03*Wj*Gj + u
b1j= r10 + r11*Gj + u

Can I use the following syntax to generate data?

MONTECARLO:
NAMES ARE y x w g ;
WITHIN = x;
BETWEEN = g w;
REPSAVE = ALL;
SAVE = rep*.dat;
Define:
prod = g * w;

MODEL POPULATION:
%WITHIN%
x@1;
s | y ON x;
y*.5;
%BETWEEN%
g@1; w@1;
y ON g*.3 w*.3 prod*.3 ;
s ON g*.3;
[ y*0 s*.3];

Thank you very much for your response!

Zack
 Linda K. Muthen posted on Thursday, December 27, 2007 - 2:02 pm
The DEFINE command can be used only with external Monte Carlo where the data sets are saved in the first step and analyzed in the second step. See Example 11.6.
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