Bookmark and Share

Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: odd behavior of -sem- in Stata 13


From   Lance Erickson <lance_erickson@byu.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   st: odd behavior of -sem- in Stata 13
Date   Thu, 11 Jul 2013 19:00:00 +0000

Has anyone experienced problems estimating SEM models in Stata 13 that ran without problems in Stata 12 (Windows 7)?

I had prepared some analyses that were successfully estimated by Stata 12 and now going back to them after installing Stata 13 there are some problems. Here's the code... 

********
sem (tenure skdis5r dauthority managersup satcowr satjobr <- WRKCNTXT) ///
	(meaningful <- WRKCNTXT) ///
	(perform <- marital WRKCNTXT meaningful) 
	if creative==1, ///
		covstr(e.satcowr e.satjobr, unstructured) ///
		covstr(e.satcowr e.managersupp, unstructured) ///
		covstr(e.dauthority e.satjobr, unstructured) ///
	method(mlmv)
********

And here is the error I get ...

********
note: The following observed variable name will be treated as a latent variable: ANsample.  If this is not your intention use the nocapslatent option, or identify the latent variable names in the latent() option.
latent variable 'ANsample' not referenced in the model
r(198);
********

The model does run in Stata 13 if I identify the latent variable in the -latent()- option as suggested by the error message. But, the SEM manual says that the command should identify variables as latent if the first letter is capitalized. Just to check, I did manage to access Stata 12 and run the exact same command runs fine without the -latent()- option. Could this be a feature change across the versions or is it a bug?

What seems particularly odd to me is that I was able to get Stata 13 to estimate the models by deleting any variables from the data set that weren't included in the model. I didn't need to add the -latent()- option either. I'm deleting many variables when I do this and I haven't taken the time to explore whether it's a single variable or set of variables that need to be deleted.

Again, does anyone know if there are known bugs with -sem- in Stata 13 that might account for this? Or am I ignorant to some new feature?

Best,
Lance

*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2018 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   Site index