# gllamm, gllapred, and marginal effects

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## gllamm, gllapred, and marginal effects

 I am trying to obtain the marginal effect after using gllamm. I have looked at prior posts which explain that one cannot use the command mfx and one should instead use the command gllapred. However, I don't quite see how it is equivalent. I am putting an example next that I ran with STATA 10. use http://www.ats.ucla.edu/stat/paperexamples/singer/hsb12.dtagen gm = (matach > 10) logit gm minority female mfx gives me variable |      dy/dx    Std. Err.     z    P>|z|  [    95% C.I.   ]      X ---------+-------------------------------------------------------------------- minority*|  -.2380667      .01292  -18.43   0.000   -.26339 -.212743   .274739   female*|  -.0772496      .01146   -6.74   0.000  -.099714 -.054785   .528184 ------------------------------------------------------------------------------ I would like to be able to replicate this with gllamm, just to make sure that I understand what I am doing. gllamm gm minority female , i(one)  link(logit) gllapred pred, mu marg Now my question is how do I go from here to obtaining the coefficient for dy/dx and Std.Err. that I obtained with mfx? Richard * *   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/
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## Re: gllamm, gllapred, and marginal effects

 On Wed, Dec 8, 2010 at 10:51 AM, richard boylan <[hidden email]> wrote: > I am putting an example next that I ran with STATA 10. > > use http://www.ats.ucla.edu/stat/paperexamples/singer/hsb12.dta> gen gm = (matach > 10) matach not found r(111); -- Stas Kolenikov, also found at http://stas.kolenikov.nameSmall print: I use this email account for mailing lists only. * *   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/
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## Re: gllamm, gllapred, and marginal effects

 Sorry!!! (copy and pasted the part of the code where I made a typo) Here is the correct one gen gm = (mathach > 10) On Wed, Dec 8, 2010 at 11:05 AM, Stas Kolenikov <[hidden email]> wrote: > On Wed, Dec 8, 2010 at 10:51 AM, richard boylan <[hidden email]> wrote: >> I am putting an example next that I ran with STATA 10. >> >> use http://www.ats.ucla.edu/stat/paperexamples/singer/hsb12.dta>> gen gm = (matach > 10) > > matach not found > r(111); > > -- > Stas Kolenikov, also found at http://stas.kolenikov.name> Small print: I use this email account for mailing lists only. > * > *   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/
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## Re: gllamm, gllapred, and marginal effects

 On Wed, Dec 8, 2010 at 11:22 AM, richard boylan <[hidden email]> wrote: > Sorry!!! (copy and pasted the part of the code where I made a typo) > > Here is the correct one > > gen gm = (mathach > 10) > math achievement, not mother attachment :) -- Stas Kolenikov, also found at http://stas.kolenikov.nameSmall print: I use this email account for mailing lists only. * *   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/