A latent categorical variable w/ dumm...
Message/Author
 Min Jung Kim posted on Friday, May 01, 2009 - 2:41 pm
Dear Dr. Muthén,

I would like to test a path model in which two dummy variables are used as mediators. I found that one way to handle this situation is to create a latent categorical variable. I have two types of alcohol provision represented with two dummy variables for parent provision and all other source of provision, with reference category was nondrinkers. I had syntax as below but it didn't work out well. Nobody was assigned to class 3 (intended to be the reference), and entropy was .58 .The frequency of the alcohol provision variable is: 70% nondrinkers, 10% parent provision, and 20% all others. I would like to examine whether means of the outcomes are different across 3 categories of the alcohol provision variable. Would you please guide me how to solve this puzzle?

%C#1%
[parent\$1@-15 others\$1@15] ;

%C#2%
[parent\$1@15 others\$1@-15] ;

%C#3%
[parents\$1@-15 others\$1@-15] ;

I would appreciate your help in advance.

Sincerely,
Min Jung Kim
 Bengt O. Muthen posted on Friday, May 01, 2009 - 5:16 pm
Don't you want the 3rd class to have +15, +15 so that parents=0 and others=0? Note that the value you specify is a threshold in the logit scale, so that a high value means a low probability of the variable being 1 (i.e. a high prob that it is 0).
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