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Re: st: Question about average marginal effects for logit models with dummy variables

From   Tirthankar Chakravarty <>
Subject   Re: st: Question about average marginal effects for logit models with dummy variables
Date   Mon, 8 Oct 2012 16:15:53 +0530

-margins- inherits whether variables are discrete or continuous from
the estimation command that precedes it (in your case -logit-). In
turn, the estimation command does its best to gauge whether included
variables are discrete or continuous.

To change the default behaviour, or indeed to be cautious, it is
advisable to use the unary operators to denote continuous and
indicator variables, "c." and "i." (as documented in -help fvvarlist-)

The documentation for the -margins- command goes into great details on
these matters (-help margins-).


On Mon, Oct 8, 2012 at 3:41 PM, Bob Reed <> wrote:
> Hi, When Stata calculates AMEs for logit models with dummy variables, does it "know" that the dummy variable is discrete, and calculate its marginal effect accordingly?
> Bob Reed
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