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Re: st: Nonlinear constraints in -ml- programming
From
Maarten Buis <[email protected]>
To
[email protected]
Subject
Re: st: Nonlinear constraints in -ml- programming
Date
Sun, 17 Feb 2013 16:44:33 +0100
On Sun, Feb 17, 2013 at 3:06 AM, Muyang Zhang <[email protected]> wrote:
> The FAQ you shared discussed the way to deal with interval
> constraints, but my problem is a "proportional constraints" where the
> coefficient of the 2nd equation over the coefficient of the 1st
> equation is constant for all dummies.
The mechanics is the same, and I guessed that that is what your were asking for.
Alternatively, you can stack the equations, i,e. turn your dataset in
a long dataset, and use -propcnsreg-, which you can get by typing in
Stata -ssc install propcnsreg-.
-- Maarten
---------------------------------
Maarten L. Buis
WZB
Reichpietschufer 50
10785 Berlin
Germany
http://www.maartenbuis.nl
---------------------------------
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