--- Simon Moore <[email protected]> wrote:
> Is there an accepted criteria for use of mvprobit over two or more
> separate probit equations? My only lead so far, from the published
> literature using mvprobit, tells me that mvprobit is best if outcome
> variables are correlated but not so correlated that dependant
> variables should be collapsed into a single variable.
It is not so much that the depedent variables are correlated, but that
the error terms are correlated. I think of it as there is some
unobserved variable that influences all dependent variables. Given my
simplistic mind I need a concrete variable, I often think about it in
terms of smart respondents are more likely to be succesful interms of
dependent variable 1 and dependent variable 2 (assuming you haven't
measured IQ or something like that). In other words the criterium is
mostly theoretical.
Hope this helps,
Maarten
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
__________________________________________________________
Sent from Yahoo! Mail.
A Smarter Inbox. http://uk.docs.yahoo.com/nowyoucan.html
*
* 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/
