Survey weights and stratum PreviousNext
Mplus Discussion > Structural Equation Modeling >
Message/Author
 Anonymous posted on Thursday, March 25, 2004 - 10:32 am
Is it possible to acocunt for both survey weights and clustering in structural equation models using MPLUS when one or more variables are categorical?
 Linda K. Muthen posted on Thursday, March 25, 2004 - 3:02 pm
Yes, in Version 3.
 Anonymous posted on Wednesday, May 18, 2005 - 4:00 pm
I want to do a path analysis for a standardized DV. So instead of a survey weight, my weight is porportional to the reciprocal of the variance of my DV. Can MPlus handle this?
 bmuthen posted on Thursday, May 19, 2005 - 11:24 am
You can use the Mplus frequency weight option. There is one catch, however, in that Mplus currently requires integer frequency weights. You can get around this approximately by replacing your weight w with 1000*w and round to integers to capture the first 3 significant digits of the weights. You should then use the MLR estimator to get results that are not scale dependent.
 Kevin Wang posted on Tuesday, October 27, 2009 - 2:09 pm
I am using version 5.2

When I use FREQWEIGHT, I receive this error message, while my computer system should exceed the required capacity. Is there any way to fix it?

*** FATAL ERROR
THERE IS NOT ENOUGH MEMORY SPACE TO RUN Mplus ON THE CURRENT
INPUT FILE. YOU CAN TRY TO FREE UP SOME MEMORY BY CLOSING OTHER
APPLICATIONS THAT ARE CURRENTLY RUNNING. NOTE THAT THE MODEL MAY
REQUIRE MORE MEMORY THAN ALLOWED BY THE OPERATING SYSTEM.
REFER TO SYSTEM REQUIREMENTS AT www.statmodel.com FOR MORE
INFORMATION ABOUT THIS LIMIT.
 Linda K. Muthen posted on Tuesday, October 27, 2009 - 2:47 pm
I don't think this has to do with FREQWEIGHT. Please send your input, data, and license number to support@statmodel.com.
 Hanno Petras posted on Thursday, March 04, 2010 - 1:55 pm
Hi Bengt,

regarding your post from 5/19/2005, wouldn't this approach change the standard errors of the estimates given the 1000 fold increase in the sample size? The reason for asking is that one of my students is trying to incorporate frequency weights from a propensity score analysis with a consequent mediation analysis. The frequency weights from PS are non-integers, but Mplus does not allow for non-integer frequency weights.Thus we followed your advice and multiplied the weights by 1000 to recover 3 digits, but this increased the sample size a 1000 fold.
Thank you for your thoughts.

Best,

Hanno
 Bengt O. Muthen posted on Thursday, March 04, 2010 - 2:18 pm
You can scale up the SEs at the end using the sqrt of the sample size ratio.
 Hanno Petras posted on Thursday, March 04, 2010 - 4:07 pm
Hi Bengt,

this worked out nicely. Thanks.

Hanno
 Paul Norris posted on Tuesday, January 07, 2014 - 1:47 pm
Dear Linda, Bengt et al,

Sorry for reviving such an old thread. I'm following the idea of multiplying weights by 1000 and rounding to integers to create weights which can be used with freqweight.

I understand how this adjustment will affect the SEs of regression coefficients etc. However, can anyone comment on how the 1000 fold increase in sample size affects the identification of groups in an LCA model. Will it affect the "optimal" number of groups identified by ABIC? How about the diagnostics with Estimator=Bayes?

Many thanks in advance,

Paul
 Bengt O. Muthen posted on Tuesday, January 07, 2014 - 2:45 pm
Seems like you can scale down the 2 parts of BIC by 1000 to get the usual BIC: the loglikelihood and the BIC penalty part. Don't know about Bayes PPP.
Back to top
Add Your Message Here
Post:
Username: Posting Information:
This is a private posting area. Only registered users and moderators may post messages here.
Password:
Options: Enable HTML code in message
Automatically activate URLs in message
Action: