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RE: st: RE: Syntax problems with maximum likelihood (method lf)


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: RE: Syntax problems with maximum likelihood (method lf)
Date   Thu, 30 Oct 2008 10:44:15 -0000

Put 

set trace on 

and 

set trace off

around buggy code to see where Stata complains. In your case, I don't see that Stata will welcome the colons in your input. 

Nick 
n.j.cox@durham.ac.uk 

Katia Bobulova

Dear Nick,

I'll try to be more clear.

following my program:

program define myprogram
version 10.0
args lnf a b c e

tempvar sigma mc ma msigma mb

quietly gen double `sigma'=0.5*`e'
quietly gen double `mc'=1-`c'
quietly gen double `ma'=1-`a'
quietly gen double `msigma'=1-`e'
quietly gen double `mb'=1-`b'

quietly replace
`lnf'=ln((`a')*(`b')*((((`mc')*(`sigma')+(`m'))^alfa)*(((`mc')*(`sigma'))^s)*(((`mc)*(`msigma'))^n))+
(`a')*(`mb)*((((`mc') *(`sigma'))^b)*(((`mc') *(`sigma')

end

Everything is fine, but when I type:

ml model lf myprogram (a:) (b:) (c:) (e:)

Stata tells me that is invalid syntax.

What's wrong?

Thanks

Katia

2008/10/29 Nick Cox <n.j.cox@durham.ac.uk>:
> It looks as if there is a bug within the part of the program you have not shown us.
>
> I suspect that you did not type
>
> version10.1
>
> as that would have generated a different error message.
>
> version 10.1
>
> is the correct syntax.
>
> In other words, you need to show more of your program to get better advice.
>
> Nick
> n.j.cox@durham.ac.uk
>
> Katia Bobulova
>
> I am using the likelihood function lf. I have a problem in the end. I
> have written the program and I don't have any problem.
>
> I typed:
> program define myprogram
> version10.1
> args lnf a b c d
> .
> .
> .
> end
>
> After this I tiped:
>
> ml model lf myprogram (a:) (b:) (c:) (d:)
>
> but Stata tells me that is an invalid syntax. Any suggestion?

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