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st: Nonlinear equation


From   "cortega" <cortega@fedea.es>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Nonlinear equation
Date   Tue, 31 Jan 2006 16:47:29 +0100

I would like to solve the following nonlinear equation for each individual in my sample. 
 
0=X-be-(la/r)*(wespe*exp(0.5*wvari)*norm(ln(X)-ln(wespe)-wvari)/((wvari)^(0.5)))-(X)*norm((ln(X)-ln(wespe))/((wvari)^(0.5)))) 
 
where "X" is the parameter I want to obtain and "be", "la", "wespe", "wvari" are variables that vary across individuals. 
I have tried using the nl command. The problem is that I only have one observation per individual and it could not solve the equation. 
 
Thank you very much,
 
Carolina Ortega 
 

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