Thank you Brian,
It worked fine with the option hasconstant(xb_constante). But when I
compared the results with my other alternative (just include
"constante" as variable without hasconstant option) I got the same
result.
I'd like to be sure if I am using the substitutable expression option
correctly. What I have to specify is a logistic function like this:
y = 1/1+exp(-bX)
where b is a parameter vector with X vector of independent
variables(eight). So I am not sure if using linear combination xb
-{eqname:varlist}- was correct.
This is what I used:
nl (iitt = 1/(1+exp(-1*{xb: lavrgdp ldpcgdp ltc lroyalsale latarif
lagi lavgest ldcap}))) nolog
What do you think my mistake was?
Maritza Sotomayor
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