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st: Could not find feasible values(was: Syntax problems with maximum likelihood (method lf))


From   "Katia Bobulova" <[email protected]>
To   [email protected]
Subject   st: Could not find feasible values(was: Syntax problems with maximum likelihood (method lf))
Date   Thu, 30 Oct 2008 11:28:08 +0000

Dear all,

thank you very much for your answers.

I finally sorted out the problem with my program.

However, when I typed ml check I received this message:

The initial values are not feasible.  This may be because the initial
values have been chosen poorly or because there is an error in my
program and it always returns missing no matter what the parameter
values.

Stata is going to use ml search to find a feasible set of initial
values. If myprogram is broken, this will not work and you will have
to press Break to make ml search stop.
Searching...
initial:       log likelihood =     -<inf>  (could not be evaluated)
searching for feasible values ..................................................
could not	find	feasible	values
r(491);

What should I do to modify myprogram so that it works? Is it possible
that the problem is the number of observations, i.e. they are not
enough?

Could you please help me?I have really no idea of how to adjust my data.

Thanks
Katia
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