Daniel,
My experience with two-part models involves health services research. In
this realm, a typical two part model is not 2SLS. Rather, the first part
involves estimating who uses health services (0=no use, 1=any use),
generally with a logit or probit model. The second part involves an
independent regression, such as a negative binomial, looking at number of
visits among users.
If you are starting to head down this track, these usefulness of these
models has been debated. A good starting point is
Mullahy, J. (1998). Much ado about two: reconsidering retransformation and
the two-part model in health econometrics. J Health Econ, 17(3), 247-281.
Todd
At 01:02 PM 10/9/2002 -0400, you wrote:
Easy question: Are two-part models the same as two-stage models as in 2SLS?
* 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/
*
* 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/
*
* 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/
