<>

There is always a good reason why Stata refuses to do certain things, so

-force- may not be such a good idea. Could also be that you are simply out

of luck with the se for the marginal effect. -h cmp- does state that "force

may be needed when running old versions of mfx to stop this behavior." But

"old" is apparently defined as pre January 2008 versions of -mfx-, which

mine is not.

HTH

Martin

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Gesendet: Samstag, 24. Juli 2010 16:42

An:

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Betreff: st: RE: marginal effects for IV ordered probit

Hi, Martin,

Thanks for your help. Yes, your command works out the marginal effects, but

I still want the standard errors for marginal effects and there's a warning

message after running "mfx, predict(pr outcome(#1)) nonlinear":

warning: predict() expression pr outcome(#5) unsuitable for standard-error

calculation;

option nose imposed

As a result, stata doesn't compute the standard errors.

So if I use the "force" option to get the standard errors of marginal

effects, are these standard errors reliable? If not, could you please tell

me how to get standard errors?

Many thanks,

Sharon

<>

Well, the help file shows examples such as

***********

mfx, predict(pr outcome(#1)) nonlinear

***********

HTH

Martin

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