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st: How to insert constraints on coefficients in xtabond.mata?


From   Natalie Trapp <natalie.trapp@zmaw.de>
To   statalist@hsphsun2.harvard.edu
Subject   st: How to insert constraints on coefficients in xtabond.mata?
Date   Mon, 21 May 2012 19:56:02 +0200

Dear Statalisters,

does anyone have an example file for how to insert constraints in xtabond.mata, such as the linear coefficient should be positive b>0 and the quadratic coefficient should be negative b^2<0?

Thank you,
Natalie
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