Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
| From | Richard Williams <Williams.NDA@comcast.net> |
| To | statalist@hsphsun2.harvard.edu, statalist@hsphsun2.harvard.edu |
| Subject | Re: st: margeff/margins discrepancy |
| Date | Sun, 25 Apr 2010 23:07:39 -0500 |
At 09:14 PM 4/25/2010, Michael Mitchell wrote:
Greetings Hmmm... ran your code and I get the same coefficient and se from -margeff- and -margins- using Stata 11, see below
Ok, I have a theory. Is there any chance you are using the old version of margeff, that has now been renamed margeff8? Because margeff8 gives the same answer as margins while margeff does not:
. margeff8
Average marginal effects on Prob(married==married) after probit
------------------------------------------------------------------------------
married | Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
wage | -.0071433 .0150751 -0.47 0.636 -.03669 .0224033
------------------------------------------------------------------------------
. margins, dydx(wage)
Average marginal effects Number of obs = 78
Model VCE : OIM
Expression : Pr(married), predict()
dy/dx w.r.t. : wage
------------------------------------------------------------------------------
| Delta-method
| dy/dx Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
wage | -.0071433 .0150751 -0.47 0.636 -.0366901 .0224034
------------------------------------------------------------------------------
. margeff
Average partial effects after probit
y = Pr(married)
------------------------------------------------------------------------------
variable | Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
wage | -.0071375 .0149933 -0.48 0.634 -.0365238 .0222489
------------------------------------------------------------------------------
-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME: (574)289-5227
EMAIL: Richard.A.Williams.5@ND.Edu
WWW: http://www.nd.edu/~rwilliam
*
* 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/