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From |
Mirko <mirko.moro@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: -warning: variables in at() list not found in model after mfx or mfx2 |

Date |
Fri, 20 Jul 2007 17:27:31 +0200 |

Dear all, I am trying to estimate marginal effects after -regoprob-. I need to estimate marginal effects at some specific values of my dependent variables. So let's say I estimated the following model: regoprob y x1 x2...x40 z1 z2 ... z30, i(pid) npl(x1 x2) Then I want to get the marginal effects using mfx2, m varlist(x1) at(z1=0, z2=0,…z10...,z30=0) or mfx, predict(p outcome(1)) varlist(x1) at(z1=0, z2=0,…z10...,z30=0) mfx, predict(p outcome(2)) varlist(x1) at(z1=0, z2=0,…z10...,z30=0) .... Both -mfx2- and –mfx- seem to work, but both the commands return a warning that reads: "-warning: variables z10 ...z30 in at() list not found in model- I checked repeatedly and those variables are (and must be) in the model. I then wondered if there was a maximum number that could be dealt with by the -at()- option. Playing with my model I found out that I stop to get that warning when I have less than 10 variables in -at()- I was therefore trying to write an example for statalist using some generated datasets, but no examples display the above behaviour (error messages), i.e. I never got that warning message and –mfx- or -mfx2- worked smoothly. Is it possible that the problem is the actual length of the –at()- option rather than the number of variables? Thank you Mirko * * 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/

**Follow-Ups**:**Re: st: -warning: variables in at() list not found in model after mfx or mfx2***From:*Richard Williams <Richard.A.Williams.5@ND.edu>

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