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Re: st: Decreasing returns


From   Ernest Berkhout <ernestb@seo.fee.uva.nl>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Decreasing returns
Date   Thu, 03 Apr 2003 15:18:48 +0200

At 15:02 3-4-2003, you wrote:
The coeffcient on X1 is positive but I believe that it exhibits declining
returns. Is there a way (in stata) to test for this (apart from including a
square term for the variable in question).
Why would you want to test otherwise? Seems like a valid solution...




Ernest Berkhout
Stichting voor Economisch Onderzoek
Universiteit van Amsterdam

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