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st: Please, help with my program


From   "Oleksandr Shepotylo" <shepotil@econ.umd.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Please, help with my program
Date   Thu, 4 Sep 2003 11:48:45 -0400

Dear statalist users,

I am writing my first program in Stata and can not find what is wrong with
the code.

I have 4 variables in the dataset: slincs indinc age i9gender.
Here is my program:

program define nlshares {slincs|?} indinc age i9gender
 if "`1'"=="?" {
  global S_1 "B0 B1 B2"
  global B0=1000
  global B1=30
  global B2=0
  exit
 }

 replace
`1'=exp($B0*indinc+$B1*age+$B2*i9gender)/(1+exp($B0*indinc+$B1*age+$B2*i9gen
der))
 end

I tried to be as close to the example in help file as possible, but I get an
error message after

nl slincs indinc age i9gender

" variable ? not found
nlshares refused query,  rc=111"

Oleksandr





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