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st: non linear regression

From   "Rune Logstein" <>
To   <>
Subject   st: non linear regression
Date   Thu, 24 Feb 2005 13:39:41 +0100

Members of statalist:


In my econometric project I intend to estimate a model with
nonlinearities. The model could be:

lnC = A+a*sin(b*x)+B*cos(d*x) +k*lnE+g*lnS, 

where A, a, b, B, d, k and g are parameters to be estimated. C and x, E
and S are variables. (the meaning of the sign " * ", means d multiplied
by x).


The interesting thing with this model is the nonlinear trigonometric
part of the model. Does anyone know how to formulate/programme such a
nonlinear function in stata? 



Rune Logstein

Phd student 



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