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Re: st: frustrated: MFX after regoprob


From   Richard Williams <Richard.A.Williams.5@ND.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: frustrated: MFX after regoprob
Date   Thu, 22 Jun 2006 12:17:53 -0400

At 10:26 AM 6/22/2006, Carol Bao wrote:
Hi, everyone,

I am estimating an random effects generalized ordered
probit model, and though I get the coefficients fine,
I cannot get marginal effects by using the mfx command
since I am getting the "Warning: ... rescaling"
First off, I don't think you are doing anything wrong. regoprob is a hybrid of gologit2 and reoprob, using code adapted from both. Early versions of gologit2 had the exact same problem with mfx not working. After spending some time on a wild goose chase of my own, I was finally able to fix that problem in gologit2, but I believe regoprob/goprobit still use the earlier problematic code. (Make sure you have the most current versions of regoprob & goprobit though.)

If you post a simple replicable example (e.g. something using auto.dta or whatever) I may be able to suggest a workaround. I'm thinking it may just be a matter of getting regoprob to use gologit2's predict command instead, but I'm not sure.

Incidentally, you may want to install -mfx2- as well. It is like a slow version of margeff! But it works with more commands, including gologit2 and goprobit. If, say, your dv has 4 outcomes, mfx2 automates the process of calling mfx 4 times, and also stores the results in a form that can be used by routines like outreg2 and estout.


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Richard Williams, Notre Dame Dept of Sociology
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