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st: Simulation question.


From   adiallo5@worldbank.org
To   statalist@hsphsun2.harvard.edu
Subject   st: Simulation question.
Date   Thu, 3 Feb 2005 08:32:16 -0500

Hi,

I have a simulation problem.

Usually, what I've seen done in simulations is to change
values in independent variables and see their result on the
(predicted dependent variable).

Ex:

reg GDP pop invest
predict gdphat
su gdphat
replace pop =pop * 1.03                                 /* 3% growth of
population*/
predict gdphat2
su gdphat2
g diff = gdphat - gdphat2                                   /*Measure of the
impact of the population growth */

Now, here is my question:

Suppose I want to double  my GDP ?
I am interested in how my independent variables will change (in their
coeffcients and/or in their observations ???)
to meet the new values of GDP.
I guess I am facing a constraint problem but do not know how to do this in
Stata.

How can I do that?

Best regards.

Amadou.

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