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st: Interpretation - margins - command and tobit model


From   Fabien Bertho <fabien.bertho@sciences-po.org>
To   statalist@hsphsun2.harvard.edu
Subject   st: Interpretation - margins - command and tobit model
Date   Mon, 1 Oct 2012 16:12:14 +0200 (CEST)

Hello,

I am running a tobit model. I would like to interpret marginal effects computed using the -margins- command. My model is the following:

- tobit ln_y x1 x2 i.x3, ul robust cluster(distance) - 

Where x3 is a dummy variable,
With,

- margins x3, atmeans -

I obtained the following results:

x3 | Margin
0  |  3.78
1  |  4.95

How can I interpret this ? My attempt:

Y is 1.17 (4.95-3.78) unit higher when x3 = 1 than when x3 = 0 -- with average values on other explicative variables. Is this correct?

Thank you very much for your help.

Fabien BERTHO


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