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st: -ml- program: v. 4 to v. 8.1 conversion

From   "Stephen P. Jenkins" <[email protected]>
To   [email protected]
Subject   st: -ml- program: v. 4 to v. 8.1 conversion
Date   Mon, 6 Oct 2003 15:33:56 +0100 (GMT Daylight Time)

I'm thinking about updating my -smfit- and -dagumfit- programs written 
in Stata version 4 (sic!) to version 8.1, but am unclear about to 
convert one key aspect of the -ml- program. These programs, fitting 
parametric functional forms to distributions of data, are a little 
unusual because they don't have a dependent variable with explanatory 
variables in the way a regression model usually does, and fitting in 
version 4 involved a particular "depv(000)" statement, thus:
~~~~~ado code extract ~~~~~~~~~~~~~~~~~~~
ml begin
ml func sm_ll
ml method deriv0
eq p1 :          
eq p2 :          
eq p3 :          
ml model c = p1 p2 p3, depv(000) from(c0)
What is the version 8.1 equivalent of the "trick" used here, please?
The "depv" option no longer exists.
[Note: the original programs simply fitted 3 parameter functional 
forms. In the update, I would also like to make each parameter 
optionally a function of covariates. The original programs are 
available using -ssc-.]

Professor Stephen P. Jenkins <[email protected]>
Institute for Social and Economic Research (ISER)
University of Essex, Colchester, CO4 3SQ, UK
Tel: +44 (0)1206 873374. Fax: +44 (0)1206 873151.

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