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Re: st: Calculating an average effect

From   Roger Newson <[email protected]>
To   [email protected]
Subject   Re: st: Calculating an average effect
Date   Thu, 25 Mar 2004 14:56:51 +0000

At 15:21 25/03/04 +0100, Hans J. Baumgartner wrote (in reply to David J. Bernstein):

If Salary is in log, then nonwhites earn on averarge _b[nonwhite] percentage more than the repecitve dummy base.
More accurately, exp(_b(nonwhite)) is the geometric mean ratio between nonwhites and whites. For more about estimating confidence intervals for geometric means and their ratios in Stata, see the Stata tip in Newson (2003).


Newson R. Stata Tip 1: the -eform()- option of -regress-. The Stata Journal 2003; 3(4): 445. Pre-publication draft downloadable from my website at

David J. Bernstein schrieb:
Hello wise ones,
I have a model where salary is a function of race
(i.e. nonwhite=1) and a set variables such as
education, seniority, etc. for 7 years.  How do I
calculate the average race effect across the 7 years?
Thanks to anyone that can help

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Hans J. Baumgartner
DIW Berlin
German Institute for Economic Research
Dept. Public Economics
K´┐Żnigin-Luise-Str. 5; 14195 Berlin; Germany
Tel.: +49/30/89789-307; Fax.: +49/30/89789-114

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Roger Newson
Lecturer in Medical Statistics
Department of Public Health Sciences
King's College London
5th Floor, Capital House
42 Weston Street
London SE1 3QD
United Kingdom

Tel: 020 7848 6648 International +44 20 7848 6648
Fax: 020 7848 6620 International +44 20 7848 6620
  or 020 7848 6605 International +44 20 7848 6605
Email: [email protected]

Opinions expressed are those of the author, not the institution.

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