Hi Nick,
I was told that the coefficients of non linear models cannot be used
directly for interpretation, and I should use mfx that give the marginal
effects (exp(B),I think). In the table, the dydx column output is the same
as the coefficients of xtnbreg, the x column is the only extra information.
What is x?
Cheers,
Pek
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Nick Cox
Sent: October-19-08 11:21 AM
To: [email protected]
Subject: st: RE: mfx after xtnbreg and how to compute predicted Y
-mfx- is giving you extra information for the model you just ran.
The help for -xtnbreg postestimation- indicate how to get predictions in
Stata. There is no need to resort to any other software.
Nick
[email protected]
Pek-Hooi Soh
I have a count panel data model with interaction terms where the terms
are mean centered.
I estimated the full model by -xtnbreg- and ran -mfx-. The marginal effect
table presents the same coefficients and standard errors as the table for
-xtnbreg-. Is this possible?
If I do get the correct -mfx- output, how do I compute predicted Y? Do I
have
compute y = exp(XB) where B stores marginal effects separately in Excel ?
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
