Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: Please help with maximum likelihood (method lf)


From   "Katia Bobulova" <katia.bobulova@googlemail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Please help with maximum likelihood (method lf)
Date   Mon, 3 Nov 2008 02:42:30 -0700

Dear all,

I am trying to perform a maximum likelihood that it is a little bit
complicate for me.
I specified the model and after that I used the command ml check to
control that everything was fine, but I received the message that
there are too few variables specified.

Could you please help me to understand what is wrong with my model? I
really need help!

Following my program:

program define myprogram
version 10.0
args lnf a d m e g p

tempvar eh  mu ma me md mg mp

quietly gen double `eh'=0.7*`e'
quietly gen double `mu'=1-`m'
quietly gen double `ma'=1-`a'
quietly gen double `me'=1-`e'
quietly gen double `md'=1-`d'
quietly gen double `mg'=1-`g'
quietly gen double `mp'=1-`p'

quietly replace
`lnf'=ln((`a')*(`d')*((((`m')*(`g')+(`mu')*(`e')*(`eh')*(`p'))^bo)*(((`m')*(`mg')+(`mu')*(`e')*(`eh')*(`mp'))^bq)*(((`mu')*(`e')*(`eh')*(`p'))^so)*(((`mu')*(`e')*(`eh')*(`mp'))^sq)*(((`mu')*(`me'))^n))+(`a')*(`md')*((((`mu')*(`e')*(`eh')*(`p'))^bo)*(((`mu')*(`e')*(`eh')*(`mp'))^bq)*(((`m')*(`g')+(`mu')*(`e')*(`eh')*(`p'))^so)*(((`m')*(`mg')+(`mu')*(`e')*(`eh')*(`mp'))^sq)*(((`mu')*(`me'))^n))+(`ma')*((((`e')*(`eh')*(`p'))^bo)*(((`e')*(`eh')*(`mp'))^bq)*(((`e')*(`eh')*(`p'))^so)*(((`e')*(`eh')*(`mp'))^sq)*((`me')^n))

end

ml model lf myprogram (a:) (d:) (m:) (e:) (g:) (p:)
ml check

After this I receive the error message.

Thank you very much for you time.

Katia
*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index