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st: non linear regression


From   somsupa Nopprach <nmayecon31@yahoo.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: non linear regression
Date   Sat, 4 Jul 2009 21:02:03 -0700 (PDT)

Dear Everyone,

 my dependent variable continuously range from -2 to 2. so, i must use logistic function to limit my estimated  value of y.
  I would like to run nonlinear(logistic) function . I read the manual in the stata version 8 and think  i should use -nl- command . i use
nl log4 y x1 x2 x3 x4 x5 x6 , initial(b0 -2 b1 4)

but when i run the coefficient is come out only four parameters of beta of logistic function, not the estimated coefficient for each of my independent variables.

 I would like to see the nonlinear relationship between my y and my xs. Could anybody please give me some advice regarding command in stata.

Bests regard,
somsupa
A Phd student.


      

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