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RE: st: RE: Interpretation of quadratic terms

From   DE SOUZA Eric <>
To   "''" <>
Subject   RE: st: RE: Interpretation of quadratic terms
Date   Thu, 11 Mar 2010 16:01:12 +0100

Dear Rodolphe,

I don't have Stata 11 either. But according to the preface to the new edition of Cameron and Trivedi, Microeconometrics using Stata:
"Second, we describe the new margins command for prediction and for computation of
marginal effects in regression models. The margins command with options including the
dydx() option replaces the Stata mfx command and the user-written margeff command.
Additionally, the margins command when used in conjunction with factor variables can
simplify computation of marginal effects in models with interactions. "

So the margins command is Stata 11 does allow one to calculate marginal effects

Eric de Souza
College of Europe
BE-8000 Brugge (Bruges)

-----Original Message-----
From: [] On Behalf Of Rodolphe Desbordes
Sent: 11 March 2010 14:59
Subject: RE: st: RE: Interpretation of quadratic terms

I do not have Stata 11 installed on this computer and I am not vary familiar with the -margins- command. However, using -margins-, you did not calculate the marginal effect but the predicted value of wage, at a given value of age.

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