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st: RE: RE: non linear regression


From   "Rune Logstein" <Rune.Logstein@nfh.uit.no>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: non linear regression
Date   Thu, 24 Feb 2005 13:47:20 +0100

I have found the family of -nl- commands but I did not found any option
for formulating sin cos functions 

rune

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of David
Harrison
Sent: 24. februar 2005 13:44
To: statalist@hsphsun2.harvard.edu
Subject: st: RE: non linear regression

Try the help/manual for -nl-

David

-----Original Message-----
From: Rune Logstein [mailto:Rune.Logstein@nfh.uit.no]
Sent: 24 February 2005 12:40
To: statalist@hsphsun2.harvard.edu
Subject: st: non linear regression


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 

Norway. 

 



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